Father goes to southern resort (3)
I believe the answer is:
spa
'resort' is the definition.
(spa is a kind of resort)
'father goes to southern' is the wordplay.
'father' becomes 'pa' (pa can mean dad or father).
'goes to' is a charade indicator (letters next to each other).
'southern' becomes 's' (abbreviation).
'pa' after 's' is 'SPA'.
(Other definitions for spa that I've seen before include "hydro" , "Where people go for spring" , "here for healthy holiday" , "Bath - mineral water spring" , "Curative resort" .)