A jazzy little group (5)
I believe the answer is:
combo
'a jazzy little group' is the definition.
The answer and definition can be both groups as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'little group' is the wordplay.
'little' becomes 'comb' (I can't explain this - if you can you should give a lot more credence to this answer).
'group' becomes 'o' (O is an example).
'comb'+'o'='COMBO'
Can you help me to learn more?
(Other definitions for combo that I've seen before include "Music group" , "Small jazz group" , "Small pop group" , "group of players" , "Small jazz or dance band" .)