Take cap, etc, off (6)
I believe the answer is:
accept
'take' is the definition.
('accept' can be a synonym of 'take')
'cap etc off' is the wordplay.
'off' is an anagram indicator.
'cap'+'etc'='capetc'
'capetc' is an anagram of 'ACCEPT'.
(Other definitions for accept that I've seen before include "Believe to be correct; take on" , "Receive willingly or take as true" , "Take up, obtain" , "Take what's offered" , "Receive the gift or agree to comply" .)