High-backed bench and light (6)
I believe the answer is:
settle
I believe this is a double definition.
'high-backed bench' is the first definition.
(I've seen this before)
'light' is the second definition.
(thesaurus)
'and' acts as a link.
(Other definitions for settle that I've seen before include "Colonise the bench" , "N Yorks town" , "Become established or pay bill" , "Finish fidgeting" , "A sort of bench" .)