Effective place to wee when camping? (6)
I believe the answer is:
potent
'effective' is the definition.
(associated in meaning)
'when camping?' is the wordplay.
'when' becomes 'po' (I can't justify this - if you can you should give a lot more credence to this answer).
'camping?' becomes 'tent' (I've seen this in other clues).
'po'+'tent'='POTENT'
'place to wee' 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.
(Other definitions for potent that I've seen before include "Mighty" , "Strong or concentrated, like some drink" , "Strong or effective" , "Top Ten (anag.)" , "Forceful" .)