Original artist getting call to entertain clubs (7)
I believe the answer is:
radical
'original' is the definition.
(thesaurus)
'artist getting call to entertain clubs' is the wordplay.
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'getting' says to put letters next to each other.
'call' becomes 'dial' (as in making a phone call).
'to entertain' means one lot of letters goes inside another.
'clubs' becomes 'c' (abbreviation used in card games such as bridge).
'dial' enclosing 'c' is 'dical'.
'ra'+'dical'='RADICAL'
(Other definitions for radical that I've seen before include "One who favours thoroughgoing reform" , "Innovative, progressive" , "Progressive - car dial (anag)" , "Politically extreme" , "objections to current policy?" .)