Popular recording grabbing one, volume is turned up (7)
I believe the answer is:
demotic
'popular' is the definition.
(synonyms)
'recording grabbing one volume is turned up' is the wordplay.
'recording' becomes 'cid' (I can't explain this - if you can you should believe this answer much more).
'grabbing' means one lot of letters goes inside another.
'one volume' becomes 'tome' (I've seen this before).
'is turned up' is a reversal indicator.
'cid' placed around 'tome' is 'citomed'.
'citomed' in reverse letter order is 'DEMOTIC'.
Can you help me to learn more?
(Other definitions for demotic that I've seen before include "Colloquial language" , "vulgar?" , "Of language or writing, of the popular form" , "Colloquial; of the people" , "Common (language)" .)