Talk about starting to ride clutch (4)
I believe the answer is:
grab
'clutch' is the definition.
(I know that grab is a more specific form of the action clutch)
'talk about starting to ride' is the wordplay.
'talk' becomes 'gab' (I've seen this in another clue).
'about' is an insertion indicator.
'starting to' says to take the initial letters.
The initial letter of 'ride' is 'r'.
'gab' going around 'r' is 'GRAB'.
(Other definitions for grab that I've seen before include "Seize suddenly" , "Seize roughly" , "Take quickly" , "Seize hold of" , "'Seize, snatch (4)'" .)