Jump over sign showing limits (10)
I believe the answer is:
boundaries
'limits' is the definition.
('boundary' can be a synonym of 'limit')
'jump over sign' is the wordplay.
'jump' becomes 'bound' (bound is a kind of jump**).
'over' is a charade indicator (letters next to each other).
'sign' becomes 'aries' (star sign).
'bound'+'aries'='BOUNDARIES'
'showing' is the link.
(Other definitions for boundaries that I've seen before include "Limits" , "Borders" .)