Conceal wickedness as victor rises to the top (4)
I believe the answer is:
veil
'conceal wickedness' is the definition.
'veil' can be an answer for 'conceal' (veiling is a kind of concealing). I'm not certain of the 'wickedness' bit.
'victor rises to the top' is the wordplay.
'victor rises' becomes 've' (I can't explain this - if you can you should give a lot more credence to this answer).
'to' becomes 'til' (I've seen this in another clue).
'the top' means to remove the first letter.
'til' with its initial letter removed is 'il'.
've'+'il'='VEIL'
'as' acts as a link.
Can you help me to learn more?
(Other definitions for veil that I've seen before include "Face-covering for brides and other women" , "Cover, conceal" , "To obscure" , "Concealing material" , "Face concealer" .)