Fusion, Kamal gamingly included (7)
I believe the answer is:
amalgam
'fusion' is the definition.
(thesaurus)
'kamal gamingly included' is the wordplay.
'included' says the answer is hidden in the clue (I've seen 'including' mean this).
'AMALGAM' is hidden in the letters of 'kamal gamingly'.
(Other definitions for amalgam that I've seen before include "Mixture/blend" , "Mixture (for dental fillings)" , "mix" , "combination of things" , "Ring-bearing hobbit" .)