Store revamped to stock electronic range of instrument (11)
I believe the answer is:
stereoscope
'store revamped' is the definition.
I can't tell whether this definition defines the answer.
'stock electronic range of instrument' is the wordplay.
'stock electronic range of' becomes 'stereo' (I can't explain this - if you can you should believe this answer much more).
'instrument' becomes 'scope' (scope is a kind of instrument).
'stereo'+'scope'='STEREOSCOPE'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for stereoscope that I've seen before include "Three-D viewer" , "Device offering 3-D viewing" , "Three D viewer" .)