Father's wise to find way through (7)
I believe the answer is:
passage
'way through' is the definition.
(I've seen this in another clue)
'father's wise' is the wordplay.
'father's' becomes 'pa's' (pa can mean dad or father).
'wise' becomes 'sage' (similar in meaning).
'pas'+'sage'='PASSAGE'
'to find' acts as a link.
(Other definitions for passage that I've seen before include "Sea or air journey" , "Aisle" , "Some reading" , "Section of musical or literary work" , "Way through something" .)