Mould is mankier when disturbed (7)
I believe the answer is:
ramekin
'mould' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?
'mankier when disturbed' is the wordplay.
'when disturbed' indicates anagramming the letters.
'mankier' anagrammed gives 'RAMEKIN'.
'is' acts as a link.
Can you help me to learn more?
(Other definitions for ramekin that I've seen before include "Small fireproof dish used for baking and serving food" , "Small round baking dish" , "Small ovenproof dish" , "pot" , "Small (savoury) dish for one person" .)