Bank on resistance accepting answer, but not often (6)
I believe the answer is:
rarely
'not often' is the definition.
('rarely' is the opposite to 'often')
'bank on resistance accepting answer' is the wordplay.
'bank' becomes 'rely' (to bank on something is to rely on it).
'on' is a charade indicator (letters next to each other).
'resistance' becomes 'r' (electronics abbreviation).
'accepting' indicates putting letters inside (inserted letters are accepted).
'answer' becomes 'a' (abbreviation eg in Q and A).
'rely' put after 'r' is 'rrely'.
'rrely' placed around 'a' is 'RARELY'.
'but' acts as a link.
(Other definitions for rarely that I've seen before include "when hundred-to-one horse wins?" , "Very occasionally" , "Not very often, seldom in fact" , "Gas used in fluorescent signs" , "Seldom, not frequently" .)