Unseemly little demon-catcher? (8)
I believe the answer is:
improper
'unseemly' is the definition.
(similar in meaning)
'little demon-catcher?' is the wordplay.
'little' means to remove the last letter (the word is not quite complete).
'demon' becomes 'imp' (I've seen this in other clues).
'catcher?' becomes 'proper' (I am not sure about this - if you are sure you should believe this answer much more).
'imp' with its final letter removed is 'im'.
'im'+'proper'='IMPROPER'
Can you help me to learn more?
(Other definitions for improper that I've seen before include "Indecent, unseemly" , "Incorrect or wrong, say behaviour" , "Unseemly, indelicate" , "Indecent or unsuitable" , "vulgar" .)