— Bridge; — whale (8)
I believe the answer is:
humpback
This clue is a double definition.
'bridge' is the first definition.
(I've seen this before)
'whale' is the second definition.
(I know that humpback is a type of baleen whale)
(Other definitions for humpback that I've seen before include "Whale - kind of bridge" , "Variety of whale or bridge" , "Handicap" , "Type of whale" .)