Lover keen on engaging a second artist (9)
I believe the answer is:
inamorato
'lover' is the definition.
(I've seen this before)
'keen on engaging a second artist' is the wordplay.
'keen on' becomes 'into' (I've seen this before).
'engaging' is an insertion indicator.
'second' becomes 'mo' (both are short periods of time).
'artist' becomes 'ra' (Royal Academician, member of Royal Academy of Arts).
'a'+'mo'+'ra'='amora'
'into' going around 'amora' is 'INAMORATO'.
(Other definitions for inamorato that I've seen before include "Beau" , "Man loved" , "One who's fond of" , "Male lover" , "I Love A Lassie" .)