Creature of habit in prison unfortunately (3)
I believe the answer is:
nun
'creature of habit' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'in prison unfortunately' is the wordplay.
'in' indicates the answer is hidden within the clue.
'NUN' is hidden within 'prison unfortunately'.
Can you help me to learn more?
(Other definitions for nun that I've seen before include "Fancy pigeon variety" , "Holy sister" , "Carmelite, for example" , "nuisance in pine forest" , "Convent dweller" .)