Those obvious problems in front of goal were reflected in the first half, despite the re-signed Wilfried Bony starting a Premier League game for Swansea for the first time since December 2014.
Brazillian Richarlison scored an 89th minute victor to deny Swansea a point after Tammy Abraham had scored his first goal at the Liberty Stadium.
"Different in the first half and the second half - we started really well in the first half and our first 35 minutes we did very well".
Clement must have shared the frustrations of home fans and made two changes at half-time - abandoning the caution of his three centre-backs approach in the search for something to spark his team.
Watford boss Marco Silva was delighted his side had quickly put last weekend's 6-0 home defeat to Manchester City behind them. We took the initiative and had more control. "We've got to go and fight for the win at West Ham".
Clement had stuck with the 5-3-2 formation which had helped Swansea claim a goalless draw away against Tottenham a week earlier. His attempted inside pass to Fernandez was cut out, and a weak effort to clear the ball by Mawson allowed Richarlison to nip in and finish past Fabianski.
The 20-year-old Brazilian pounced on a mistake by Alfie Mawson to score late
Swansea produced a limp first-half display against the Hornets and Clement was so frustrated with his own tactics and his players' listless performances that he considered making substitutions before the interval. That is not good enough.
"That's not enough. I am very disappointed for the supporters because they have come here three times this season and we have lost every game".
"It is supposed to be easier at home but for some reason at the moment it is not". The crowd were disappointed at the end of the first half and I could understand that because I was the same.
"It was a tough afternoon last week, but it's in the past", Silva said. Our team showed they had forgotten what happened last Saturday, which was really important. Gray, though, did not have wait long to find the net on a ground where he scored twice for Burnley last season.
"We started the game with some really nice football, we scored a goal and controlled the match".
"You never kill the match in the Premier League but to score the second goal would give our team would more confidence in the match".
Gray could, and perhaps should, have scored his second five minutes before the break when he latched onto Alfie Mawson's poor back pass.