On one side of college, student welcoming former artist (10)
I believe the answer is:
unilateral
'on one side' is the definition.
(I've seen this before)
'college student welcoming former artist' is the wordplay.
'college' becomes 'uni' (short for university).
'student' becomes 'l' (as in L-plates for learner drivers).
'welcoming' is an insertion indicator (in sense of 'inviting in').
'former' becomes 'late' (late can mean former or previous).
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'uni'+'l'='unil'
'late'+'ra'='latera'
'unil' placed around 'latera' is 'UNILATERAL'.
'of' is the link.
(Other definitions for unilateral that I've seen before include "affecting only one person out of several" , "One-sided" , "Done only by one side" .)