Gas associated with large behind? It could lift you off your feet! (8)
I believe the answer is:
windlass
'gas associated' is the definition.
I can't tell whether this defines the answer.
'large behind? it could lift you off your feet' is the wordplay.
I cannot quite see how this works, but
'large' could be 'l' and 'l' is present in the answer.
'behind?' could be 'ass' ('ass' can be a synonym of 'behind') and 'ass' is present in the answer.
'lift' could be 'wind' (winding is a kind of lifting) and 'wind' is present in the answer.
No letters remain.
This explanation may well be incorrect...
'with' is the link.
Can you help me to learn more?
(Other definitions for windlass that I've seen before include "One that gets wound up" , "Drum round which chain is wound for lifting" , "Axle for rope or chain used in hoisting" , "Winch for hoisting an anchor" , "Ship's winch" .)