Break chair to get back bean (7)
I believe the answer is:
haricot
'bean' is the definition.
(haricot is a type of bean)
'break chair to get back' is the wordplay.
'break' indicates anagramming the letters.
'get back' is a reversal indicator (I've seen 'got back' mean this).
'to' reversed gives 'ot'.
'chair' anagrammed gives 'haric'.
'haric'+'ot'='HARICOT'
(Other definitions for haricot that I've seen before include "Vegetable" , "Variety of bean" , "French bean" , "Type of bean in a chariot" , "kind of ragout" .)