Support for a couple (5)
I believe the answer is:
brace
I believe this clue is a double definition.
'support' is the first definition.
(bracing is a kind of supporting)
'a couple' is the second definition.
(brace can mean a pair of something)
'for' is the link.
(Other definitions for brace that I've seen before include "double" , "Support - pair" , "Stanchion" , "Steady; pair" , "Strengthener; pair" .)