Restricts (6)
'restricts' is the definition.
('curb' can be a synonym of 'restrict')
This is all the clue.
(Other definitions for curbs that I've seen before include "Keeps in check" , "Restrains" , "Place restrictions on" .)
'restricts' is the definition.
('limit' can be a synonym of 'restrict')
This is all the clue.
(Other definitions for limits that I've seen before include "Boundaries or furthest reaches" , "Frontiers" , "Boundaries, confines" , "Bounds beyond which one cannot go" , "'Boundaries, demarcation lines (6)'" .)