Academic clash or wrangling (7)
I believe the answer is:
scholar
'academic' is the definition.
(I've seen this before)
'clash or wrangling' is the wordplay.
'wrangling' indicates an anagram (wrangle can mean to round up and organise).
'clash'+'or'='clashor'
'clashor' is an anagram of 'SCHOLAR'.
(Other definitions for scholar that I've seen before include "Pupil - erudite person" , "Person of learning" , "Academic, schoolboy" , "Learned type" , "Academic; pupil" .)