Professional educationist is investigated (6)
I believe the answer is:
probed
'is investigated' is the definition.
(I've seen this before)
'professional educationist' is the wordplay.
'professional' becomes 'pro' ('pro' can be a synonym of 'professional'**).
'educationist' becomes 'bed' (educational qualification).
'pro'+'bed'='PROBED'
(Other definitions for probed that I've seen before include "Searched" , "Physically examined" , "Investigating closely" , "Investigated closely as dentist does a tooth" , "Examined, dug into" .)