Decide to repair boot Victor's wearing (7)
I believe the answer is:
resolve
'decide' is the definition.
(resolving is a kind of deciding)
'repair boot victor's wearing' is the wordplay.
I cannot really see how this works, but
'victor' could be 'v' (phonetic alphabet: alpha, bravo, charlie etc.) and 'v' is found within the answer.
'repair' could be 'resole' (resoling is a kind of repairing) and 'resole' is present in the leftover letters.
This accounts for all the letters.
This may be the basis of clue (or it may be nonsense).
'to' is the link.
(Other definitions for resolve that I've seen before include "Make a firm decision" , "Settle (a matter)" , "Determine with conviction" , "Settle; determination" , "find an answer" .)