Victor gets in by means of exam (4)
I believe the answer is:
viva
'exam' is the definition.
(short for 'viva voce', an oral examination)
'victor gets in by means of' is the wordplay.
'victor' becomes 'V' (phonetic alphabet: alpha, bravo, charlie etc.).
'gets in' means one lot of letters goes inside another.
'by means of' becomes 'via' (I've seen this before).
'v' inserted into 'via' is 'VIVA'.
(Other definitions for viva that I've seen before include "test" , "Long live! - oral exam" , "Do well in Italian" , "Kind of exam" , "Long live! - an examination" .)