Return to take exam again around six (7)
I believe the answer is:
revisit
'return to' is the definition.
(thesaurus)
'take exam again around six' is the wordplay.
'take exam again' becomes 'resit' (I've seen this before).
'around' means one lot of letters goes inside another.
'six' becomes 'vi' (roman numeral).
'resit' placed around 'vi' is 'REVISIT'.
(Other definitions for revisit that I've seen before include "repeated call?" , "Consider again" , "Pay further call" , "comeback?" , "Go back to (place)" .)