Spare bank (4)
I believe the answer is:
lean
This clue is a double definition.
'spare' is the first definition.
(similar in meaning)
'bank' is the second definition.
(bank can mean to lean or tilt)
(Other definitions for lean that I've seen before include "Incline; (of person) thin" , "Spare - list" , "What Jack Sprat's wife couldn't eat" , "Thin; rest (against)" , "Slim; veer" .)