Kick-off for Spurs after attack goes in (4)
I believe the answer is:
fits
'goes in' is the definition.
'kick-off for spurs after attack' is the wordplay.
'kick-off for' indicates taking the first letters.
'after' means one lot of letters go next to another.
'attack' becomes 'fit' (fit is a kind of attack**).
The first letter of 'spurs' is 's'.
's' after 'fit' is 'FITS'.
(Other definitions for fits that I've seen before include "feels comfortable" , "Is of the right shape and size" , "Prepares" , "Paroxysms" , "Seizures" .)