Runs out of gap on river in swimsuit? (9)
I believe the answer is:
beachwear
'runs out' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'gap on river in swimsuit?' is the wordplay.
'gap on river in' becomes 'beach' (I can't explain this - if you can you should believe this answer much more).
'swimsuit?' becomes 'wear' (swimsuit is a kind of wear).
'beach'+'wear'='BEACHWEAR'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for beachwear that I've seen before include "Bikini, for instance" , "Trunks, bikinis etc" , "Holiday clothing" , "skimpy garments" , "Speedos for one" .)