Crash a new Golf after spin (5)
I believe the answer is:
prang
'crash' is the definition.
(to prang is to crash a car)
'a new golf after spin' is the wordplay.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'golf' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
'after' means one lot of letters go next to another.
'spin' becomes 'PR' (public relations).
'a'+'n'+'g'='ang'
'ang' put after 'pr' is 'PRANG'.
(Other definitions for prang that I've seen before include "knock" , "Popularly, a motoring contretemps" , "Minor accident" , "Minor shunt" , "Crash involving a car" .)