Everyone taken in by benefit that’s subject to inflation (7)
I believe the answer is:
balloon
'subject to inflation' is the definition.
I can't judge whether this defines the answer.
'everyone taken in by benefit' is the wordplay.
'everyone' becomes 'all' (all people).
'taken in by' is an insertion indicator.
'benefit' becomes 'boon' (a boon is a help or benefit).
'all' put into 'boon' is 'BALLOON'.
'that's' is the link.
Can you help me to learn more?
(Other definitions for balloon that I've seen before include "In which Charlie Brown expressed himself" , "Inflate" , "Inflatable rubber bag, could be filled with hot air" , "See 21" , "Inflatable - rapidly expand" .)