Bus middle easterner can manoeuvre behind church (9)
I believe the answer is:
charabanc
'bus' is the definition.
(synonyms)
'middle easterner can manoeuvre behind church' is the wordplay.
'middle easterner' becomes 'arab' (I've seen this in another clue).
'manoeuvre' is an anagram indicator.
'behind' means one lot of letters go next to another.
'church' becomes 'ch' (common abbreviation).
'can' is an anagram of 'anc'.
'arab'+'anc'='arabanc'
'arabanc' put after 'ch' is 'CHARABANC'.
(Other definitions for charabanc that I've seen before include "E.g. transport" , "Old vehicle" , "Early coach" , "An ABC arch (anag) - early excursion bus" , "Old tourist coach" .)