Victor getting in by way of examination (4)
I believe the answer is:
viva
'examination' is the definition.
(I have seen 'Oral examination' mean 'viva' so perhaps 'examination' could also mean 'viva')
'victor getting in by way of' is the wordplay.
'victor' becomes 'V' (phonetic alphabet: alpha, bravo, charlie etc.).
'getting in' is an insertion indicator.
'by way of' becomes 'via' (I've seen this before).
'v' placed inside 'via' is 'VIVA'.
(Other definitions for viva that I've seen before include "Long live! - oral exam" , "Long live! - an examination" , "Do well in Italian" , "academic exam!" , "Kind of exam" .)