A good person turned, receiving info for spies (6)
I believe the answer is:
agents
'spies' is the definition.
(I've seen this before)
'a good person turned receiving info' is the wordplay.
'good person' becomes 'st' (saint).
'turned' shows that the letters should be reversed in order.
'receiving' indicates putting letters inside.
'info' becomes 'gen' (informal term for information).
'st' back-to-front is 'ts'.
'a'+'ts'='ats'
'ats' placed around 'gen' is 'AGENTS'.
'for' is the link.
(Other definitions for agents that I've seen before include "Spies" , "They operate on behalf of others" , "They act for actors" , "Sales reps" , "They act for others" .)