Brilliant worker going round university with relative (5,4)
I believe the answer is:
great aunt
'relative' is the definition.
(I've seen this before)
'brilliant worker going round university' is the wordplay.
'brilliant' becomes 'great' (I can't justify this - if you can you should believe this answer much more).
'worker' becomes 'ant' (worker is a type of ant).
'going round' means one lot of letters goes inside another (some letters go around others).
'university' becomes 'U' (abbreviation as in UMass).
'ant' going around 'u' is 'aunt'.
'great'+'aunt'='GREAT-AUNT'
'with' acts as a link.
Can you help me to learn more?
(Other definitions for great aunt that I've seen before include "Relation" , "Old lady" , "Female earlier in line" , "elderly relative" .)