Award for a zero mark? (5)
I believe the answer is:
oscar
'award' is the definition.
(an Academy Award)
'zero mark?' is the wordplay.
'zero' becomes 'O' (O resembles 0).
'mark?' becomes 'scar' (mark left by an injury).
'o'+'scar'='OSCAR'
'for a' is the link.
(Other definitions for oscar that I've seen before include "Film prize" , "Librettist Hammerstein, d. 1960" , "feature of award ceremony" , "Man" , "Hollywood statuette given as annual award" .)