Religious service provided that range (6)

I believe the answer is:

massif

'that range' is the definition.
(I've seen this before)

'religious service provided' is the wordplay.
'religious service' becomes 'mass' (I've seen this before).
'provided' becomes 'if'.
'mass'+'if'='MASSIF'

(Other definitions for massif that I've seen before include "Block of mountains" , "Mountain centre" , "Highland area?" , "large amount of rock" , "IMF ass found on mountainous plateau" .)

I've seen this clue in The Telegraph.

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