Narrow religious education brought into play (4)

I believe the answer is:

used

I'm a little stuck... Click here to teach me more about this clue!

'brought into play' is the definition.
(I've seen this before)

'narrow religious education' is the wordplay.
'USED' is hidden in amongst the letters.
However, I am unsure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for used that I've seen before include "Sued (anag.)" , "No longer new" , "worked unfairly" , "Second-hand; exploited" , "Employed in task, or second-hand" .)

I've seen this clue in the Sydney Morning Herald.

Want a hint initially instead of a full solution? Install my app