Faith very receptive to suggestion (6)
I believe the answer is:
shinto
'faith' is the definition.
(Shinto is an example)
'very receptive to suggestion' is the wordplay.
'very' becomes 'so' (I've seen this in other clues).
'receptive to' means one lot of letters goes inside another (some letters receive others inside).
'suggestion' becomes 'hint' (hint is a kind of suggestion).
'so' going around 'hint' is 'SHINTO'.
(Other definitions for shinto that I've seen before include "faith" , "Japanese cult" , "State religion of Japan until 1945" , "Religious system" , "Japanese worship" .)