Approximating repair in range (7)
I believe the answer is:
nearing
'approximating' is the definition.
(thesaurus)
'repair in range' is the wordplay.
'repair' indicates anagramming the letters (letters are fixed or repaired).
'in'+'range'='inrange'
'inrange' anagrammed gives 'NEARING'.
(Other definitions for nearing that I've seen before include "Getting close to" , "Drawing closer to" , "Approaching" , "Moving towards" .)