Motörhead legend heading off for award (4)
I believe the answer is:
emmy
'award' is the definition.
(I've seen this before)
'motorhead legend heading off' is the wordplay.
'motorhead legend' becomes 'lemmy' (lead singer of Motorhead).
'heading off' means to remove the first letter.
'lemmy' with its first letter removed is 'EMMY'.
'for' acts as a link.
(Other definitions for emmy that I've seen before include "British television award" , "US television award" , "Mark of quality on box" , "Annual television award" , "Television equivalent of Hollywood's Oscar" .)