Southend boss Phil Brown says Conor Clifford's winner at Cheltenham was the perfect response to being dropped.
Clifford, 22, replaced Ryan Leonard after 35 minutes and scored the only goal in Tuesday's victory.
With Leonard out for up to three weeks with a hamstring injury, Clifford is set to regain his starting spot at York having lost his place two weeks ago.
"Conor came in and got on the ball and showed me that I shouldn't have dropped him," Brown told BBC Essex.
"You do lose individuals and you just hope that the individual that replaces him steps up to the plate. We got a great example of that on Tuesday night."
Former Chelsea and Leicester midfielder Clifford has netted twice in eight appearances this season, having scored once in 28 appearances in his first season at the club last term.