Work miracle to get back (7)
I believe the answer is:
reclaim
'get back' is the definition.
(I've seen this before)
'work miracle' is the wordplay.
'work' is an anagram indicator.
'miracle' anagrammed gives 'RECLAIM'.
'to' acts as a link.
(Other definitions for reclaim that I've seen before include "Win back" , "Salvage" , "I'm Clare (anag)" , "Bring under cultivation" , "Convert" .)