Artist getting call to visit African country is keen to start (6,2,2)
I believe the answer is:
raring to go
'keen to start' is the definition.
(phrase meaning ready or excited to begin)
'artist getting call to visit african country' is the wordplay.
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'getting' is a charade indicator (letters next to each other).
'call' becomes 'ring' (synonyms).
'to visit' is a charade indicator (letters next to each other).
'african country' becomes 'Togo' (Togo is an example).
'ra'+'ring'+'togo'='RARING TO GO'
'is' is the link.
(Other definitions for raring to go that I've seen before include "Gung-ho" , "Champing at the bit" , "showing enthusiasm" , "Eager to begin" .)