War vehicle in church, leading to a disturbance (7)
I believe the answer is:
chariot
'war vehicle' is the definition.
(chariots were historically used in battle)
'church leading to a disturbance' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'leading to' says to put letters next to each other (some letters go before or lead others).
'disturbance' becomes 'riot' (I've seen this in another clue).
'ch'+'a'+'riot'='CHARIOT'
'in' acts as a link.
(Other definitions for chariot that I've seen before include "'Two-wheeled, horse-drawn vehicle (7)'" , "ride in carriage" , "American religious folksong 'Swing low, sweet ...'" , "A torch I placed on old wheeled two-vehicle" , "Ben Hur's car" .)