Sell off the Humber crossing? Just a game (7,6)
I believe the answer is:
auction bridge
'game' is the definition.
(auction bridge is a kind of game)
'sell off' is the wordplay.
'sell' becomes 'auction' (auctioning is a kind of selling).
'off' becomes 'bridge' (I can't explain this - if you can you should give a lot more credence to this answer).
'auction'+'bridge'='AUCTION BRIDGE'
'the humber crossing? just a' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for auction bridge that I've seen before include "Four - handed card game" , "Card game now superseded by contract" , "Game superseded by 1 down" .)