Cancel year in French university, being employed by uncle regularly (5)
I believe the answer is:
annul
'cancel' is the definition.
(annulling is a kind of cancelling)
'year in french university being employed by uncle regularly' is the wordplay.
'year in french' becomes 'an' ('year' in French).
'university' becomes 'u'.
'being employed by' indicates putting letters inside.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
The alternating letters of 'uncle' are 'nl'.
'u' going into 'nl' is 'nul'.
'an'+'nul'='ANNUL'
(Other definitions for annul that I've seen before include "Render invalid" , "Cancel, revoke" , "Repeal, rescind" , "Cancel, say a law" , "Nullify" .)