Taking off, having snatched a number of bells? That’s tempting (9)
I believe the answer is:
appealing
'tempting' is the definition.
(thesaurus)
'taking off having snatched a number of bells?' is the wordplay.
'taking off' becomes 'aping' (both can mean imitating or mocking).
'having snatched' is an insertion indicator.
'a number of bells?' becomes 'peal' (I am not sure about this - if you are sure you should believe this answer much more).
'aping' placed around 'peal' is 'APPEALING'.
'that's' is the link.
Can you help me to learn more?
(Other definitions for appealing that I've seen before include "Challenging a judgment" , "pleasing" , "Making a heartfelt request" , "Asking for donation to charity" , "Taking a case to a higher court" .)