Still juggles it in the juggling acts (6)
I believe the answer is:
static
'still' is the definition.
(static can mean still or not moving)
'juggles it in the juggling acts' is the wordplay.
'juggles' indicates an anagram (I've seen 'juggled' mean this).
'in the' is an insertion indicator.
'juggling' indicates an anagram (I've seen this in other clues).
'it' with letters rearranged gives 'ti'.
'acts' anagrammed gives 'stac'.
'ti' put within 'stac' is 'STATIC'.
(Other definitions for static that I've seen before include "Stuck in a traffic jam" , "Noise caused by electrical interferance" , "Not active or moving" , "Constant interference" , "Its cat (anag)" .)