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' is an anagram indicator (I've seen 'juggled' mean this).
'in the' means one lot of letters goes inside another.
'juggling' indicates anagramming the letters (I've seen this in other clues).
'it' with letters rearranged gives 'ti'.
'acts' with letters rearranged 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)" .)