Retreat from the mirage shimmering (9)
I believe the answer is:
hermitage
'retreat' is the definition.
(a hermitage may be a religious retreat)
'the mirage shimmering' is the wordplay.
'shimmering' indicates anagramming the letters (I've seen this in other clues).
'the'+'mirage'='themirage'
'themirage' anagrammed gives 'HERMITAGE'.
'from' acts as a link.
(Other definitions for hermitage that I've seen before include "Home of a recluse" , "Museum housing collection started by Catherine the Great" , "St Petersburg museum - Rhone wine" , "accommodation for one" , "Place of retreat" .)