Purple and beige urn -- a potty (9)
I believe the answer is:
aubergine
'purple' is the definition.
(I've seen this before)
'beige urn a potty' is the wordplay.
'potty' indicates an anagram.
'beige'+'urn'+'a'='beigeurna'
'beigeurna' anagrammed gives 'AUBERGINE'.
'and' is the link.
(Other definitions for aubergine that I've seen before include "Edible plant" , "Vegetarians might order this" , "Fruit of the eggplant" , "Vegetable strangely found in a burgee" , "Fruit cooked and eaten as a vegetable" .)