Where one might stop champions, club and everything? (4,2,4)
I believe the answer is:
port of call
'where one might stop champions club' is the definition.
The answer is a location as well as being a singular noun. This is suggested by the definition.
'everything?' is the wordplay.
I cannot really see how this works, but
'everything?' could be 'all' (I've seen this before) and 'all' is found in the answer.
This explanation may well be incorrect...
'and' is the link.
Can you help me to learn more?
(Other definitions for port of call that I've seen before include "place to stop en route" , "Place briefly visited" .)