Live comfortably supporting daughter (5)
I believe the answer is:
dwell
'live' is the definition.
(to live/dwell somewhere)
'comfortably supporting daughter' is the wordplay.
'comfortably' becomes 'well' (synonyms).
'supporting' means one lot of letters go next to another (in a down clue, some letters go below others).
'daughter' becomes 'd' (genealogical abbreviation).
'well' put after 'd' is 'DWELL'.
(Other definitions for dwell that I've seen before include "Live (in a place)" , "Remain" , "Settle" , "Inhabit" , "Think moodily (on something)" .)