Support for capital punishment? (7)
I believe the answer is:
gallows
'support for capital punishment?' is the definition.
(wooden support for a hanging)
This is the entire clue.
(Other definitions for gallows that I've seen before include "Here one may end" , "Stage for hangings" , "Frame for execution" , "Black comedy or jokes" , "5 dn [GRIM REAPER] might appear here" .)