Professional dream, a learner becoming qualified (11)
I believe the answer is:
provisional
'qualified' is the definition.
(thesaurus)
'professional dream a learner' is the wordplay.
'professional' becomes 'pro' ('pro' can be a synonym of 'professional').
'dream' becomes 'vision' (I've seen this before).
'learner' becomes 'l'.
'pro'+'vision'+'a'+'l'='PROVISIONAL'
'becoming' is the link.
(Other definitions for provisional that I've seen before include "Temporary - conditional" , "Temporary, interim" , "Temporary - viral poison (anag)" , "Pending subsequent decision" .)