What you aim to do, only without Victor (5)
I believe the answer is:
solve
'what you aim to do' is the definition.
The definition suggests a singular noun but the answer is not.
'only without victor' is the wordplay.
'only' becomes 'sole' (synonyms).
'without' indicates putting letters inside ('without' can be similar in meaning to 'outside').
'victor' becomes 'V' (phonetic alphabet: alpha, bravo, charlie etc.).
'sole' going around 'v' is 'SOLVE'.
Can you help me to learn more?
(Other definitions for solve that I've seen before include "Find an answer to (a problem)" , "Find the answer or explanation" , "Settle" , "Unravel (a problem)" , "Find the key - work out" .)