Golf GTI shedding the odd bits frequently (3)
I believe the answer is:
oft
'frequently' is the definition.
(oft can mean frequently, eg oft-quoted)
'golf gti shedding the odd bits' is the wordplay.
'shedding the odd bits' means one should take alternating letters (letters in odd-numbered positions are removed).
'golf'+'gti'='golfgti'
The alternating letters of 'golfgti' are 'OFT'.
(Other definitions for oft that I've seen before include "Consistently" , "Frequently, in verse" , "Old song'... in the stilly night'" , "time and again in literature" , "Many a time to the poet." .)