Detectives try to surround father's changing room (6)
I believe the answer is:
vestry
'father's changing room' is the definition.
(I've seen this in another clue)
'detectives try to surround' is the wordplay.
'VESTRY' is hidden within the letters.
But, I am not sure how the hidden word is indicated.
Can you help me to learn more?
(Other definitions for vestry that I've seen before include "meeting of parishioners" , "Somewhere in church" , "Small room attached to church" , "Church changing room" , "Storage and dressing room in a church" .)