Prison officer to make another sketch after reflection (6)
I believe the answer is:
warder
'prison officer' is the definition.
(I've seen this before)
'another sketch after reflection' is the wordplay.
'another' becomes 're' (I've seen this in other clues).
'sketch' becomes 'draw' (to sketch is to draw).
'after reflection' shows that the letters should be reversed in order.
're'+'draw'='redraw'
'redraw' reversed gives 'WARDER'.
'to make' acts as a link.
(Other definitions for warder that I've seen before include "Gaoler" , "Reward for prison guard" , "keeper" , "Jailer" , "screw" .)