Still stupid tackling one on rug (9)
I believe the answer is:
inanimate
'still' is the definition.
(thesaurus)
'stupid tackling one on rug' is the wordplay.
'stupid' becomes 'inane' (I've seen this before**).
'tackling' is an insertion indicator (I've seen this in other clues).
'one' becomes 'i' (Roman numeral).
'on' means one lot of letters go next to another.
'rug' becomes 'mat' (I've seen this before).
'i'+'mat'='imat'
'inane' enclosing 'imat' is 'INANIMATE'.
(Other definitions for inanimate that I've seen before include "Not endowed with life" , "Unlikely to move" , "unable to move" , "Without life" , "lacking in spirit" .)