Leaders of priests equipped with seat in church (3)
I believe the answer is:
pew
'seat in church' is the definition.
(I've seen this before)
'leaders of priests equipped with' is the wordplay.
'leaders of' suggests taking the first letters.
The initial letters of 'priests equipped with' is 'PEW'.
(Other definitions for pew that I've seen before include "Where some of the flock rest" , "Bench-like seat in a church" , "Long church seat" , "Part of flock sitting here" , "Long bench in a church" .)