Smelly clothes an advantage in bridge (6,4)
I believe the answer is:
strong suit
'an advantage in bridge' is the definition.
I don't know anything about this answer so I can't tell whether this works.
'smelly clothes' is the wordplay.
'smelly' becomes 'strong' (I can't justify this - if you can you should give a lot more credence to this answer).
'clothes' becomes 'suit' (set of clothes).
'strong'+'suit'='STRONG SUIT'
Can you help me to learn more?
(Other definitions for strong suit that I've seen before include "Something at which one excels" , "special talent" .)