Explained voles away to daughter (6)
I believe the answer is:
solved
'explained' is the definition.
(solve can mean to explain or provide a reason for)
'voles away to daughter' is the wordplay.
'away' indicates anagramming the letters (letters move away from their original places).
'to daughter' becomes 'd' (genealogical abbreviation).
'voles' anagrammed gives 'solve'.
'solve'+'d'='SOLVED'
(Other definitions for solved that I've seen before include "Discovered the answer to a puzzle" , "Explained or answered a mystery" , "Explained or answered, puzzle say" , "Cracked" , "Found a solution" .)