Like a teacher, used role-play at one college (8)
I believe the answer is:
didactic
'like a teacher' is the definition.
(I've seen this before)
'role-play at one college' is the wordplay.
I cannot quite understand how this works, but
'play' could be 'act' (synonyms) and 'act' is found in the answer.
'one' could be 'i' (Roman numeral) and 'i' is found within the answer.
'college' could be 'c' and 'c' is located in the answer.
This explanation may well be incorrect...
'used' acts as a link.
Can you help me to learn more?
(Other definitions for didactic that I've seen before include "giving instruction" , "Morally instructive" , "(Tale) with a message" , "Having the manner of one lecturing pupils" , "like a school-teacher?" .)