It's clear father needs camping gear (6)
I believe the answer is:
patent
'it's clear' is the definition.
(synonyms)
'father needs camping gear' is the wordplay.
'father' becomes 'pa' (pa can mean dad or father).
'needs' is a charade indicator (letters next to each other).
'camping gear' becomes 'tent' (I've seen this in another clue).
'pa'+'tent'='PATENT'
(Other definitions for patent that I've seen before include "Register (an invention)" , "evident" , "Registration of an invention or trade name" , "Blatant" , "For all to see" .)