Model's cold before interior shot (9)
I believe the answer is:
criterion
'model's' is the definition.
(thesaurus)
'cold before interior shot' is the wordplay.
'cold' becomes 'c' (eg on taps).
'before' says to put letters next to each other.
'shot' indicates anagramming the letters.
'interior' anagrammed gives 'riterion'.
'c'+'riterion'='CRITERION'
(Other definitions for criterion that I've seen before include "Touchstone" , "Standard by which to judge" , "Benchmark - standard" , "Judging standard" , "Standard, reference point" .)