Miles away, daughter looked happy (6)
I believe the answer is:
smiled
'looked happy' is the definition.
(I've seen this in another clue)
'miles away daughter' is the wordplay.
'away' indicates anagramming the letters (letters move away from their original places).
'daughter' becomes 'd' (genealogical abbreviation).
'miles' is an anagram of 'smile'.
'smile'+'d'='SMILED'
(Other definitions for smiled that I've seen before include "Assumed facial expression indicating pleasure" , "Looked happy" , "Beamed" , "Grinned" , "Showed pleasure" .)