Roughly (13)
'roughly' is the definition.
(synonyms)
This is all the clue.
(Other definitions for approximately that I've seen before include "Around, thereabouts" , "Roughly" , "Circa" , "More or less" .)
'roughly' is the definition.
('10 or so' can mean 'roughly 10')
This is all the clue.
(Other definitions for or so that I've seen before include "Approximately" , "More or less" , "roughly" , "Something like" .)