Seat for a chap at church (5)
I believe the answer is:
bench
'seat' is the definition.
(bench is a kind of seat)
'a chap at church' is the wordplay.
'a chap' becomes 'ben' (**).
'at' says to put letters next to each other.
'church' becomes 'ch' (common abbreviation).
'ben'+'ch'='BENCH'
'for' is the link.
(Other definitions for bench that I've seen before include "Exhibit at dog show" , "Long seat for judges" , "Pew or settle" , "Long seat or worktable" , "Group of magistrates" .)