Nick may be up to this if good enough (7)
I believe the answer is:
scratch
I believe this is a double definition.
'nick' is the first definition.
(I've seen this before)
'may be up to this if good enough' is the second definition.
(up to scratch)
(Other definitions for scratch that I've seen before include "Handicap where expected to make" , "Receiving no allowance < , ready" , "handle superficial irritation" , "withdraw from event" , "Abraded skin areas" .)