The range of some Romanov enquiry (4)
I believe the answer is:
oven
'the range' is the definition.
(range is a type of oven)
'some romanov enquiry' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'OVEN' can be found hidden inside 'romanov enquiry'.
'of' is the link.
(Other definitions for oven that I've seen before include "Meat is roasted in it" , "Compartment for heating" , "Hot spot" , "A hot place" , "Stove" .)