Remove hair at second try (5)
I believe the answer is:
shear
'remove hair' is the definition.
'at second try' is the wordplay.
'at' is a charade indicator (letters next to each other).
'second' becomes 's' (common abbreviation).
'try' becomes 'hear' (as in to try someone in court or hear their case).
's'+'hear' is 'SHEAR'.
(Other definitions for shear that I've seen before include "Fleece (a sheep)" , "shave" , "strain" , "Remove a fleece" , "Cut the wool of 14 across" .)