Communist has university student given lines (5)
I believe the answer is:
ruled
'given lines' is the definition.
The answer and definition can be both related to change as well as being past participle verbs.
Maybe there's an association between them I don't understand?
'communist has university student' is the wordplay.
'communist' becomes 'red' (red can informally mean communist).
'has' is an insertion indicator.
'university' becomes 'U' (abbreviation for university).
'student' becomes 'L' (as in L-plates for learner drivers).
'u'+'l'='ul'
'red' enclosing 'ul' is 'RULED'.
Can you help me to learn more?
(Other definitions for ruled that I've seen before include "Were tops" , "Held the reins" , "Made authoritative statement" , "Reigned - lined - decided" , "(Of writing paper) having printed lines" .)