Power in drubbings lifted state of shock (6)
I believe the answer is:
stupor
'state of shock' is the definition.
(I've seen this before)
'power in drubbings lifted' is the wordplay.
'power' becomes 'p' (symbol in physics).
'in' is an insertion indicator.
'drubbings' becomes 'routs' (I've seen this in another clue).
'lifted' says the letters should be written in reverse (going up in down clue).
'p' going within 'routs' is 'roputs'.
'roputs' written backwards gives 'STUPOR'.
(Other definitions for stupor that I've seen before include "State of being stunned" , "numbness" , "Stupefaction, daze" , "Semi-comatose state" , "Almost unconscious condition caused by drink or drugs" .)