School said to be taken in (5)
I believe the answer is:
eaten
'be taken in' is the definition.
(take in can mean to eat)
'school said' is the wordplay.
'school' becomes 'eton' (famous UK public school).
'said' indicates a 'sounds like' (homophone) clue.
'eton' sounds like 'EATEN'.
'to' is the link.
(Other definitions for eaten that I've seen before include "Scoffed" , "Swallowed" , "corroded" , "Crammed" , "used for food" .)