Ones from Tunis?
I believe the answer is:
units
'ones' is the definition.
('unit' can be a synonym of 'one')
'from tunis?' is the wordplay.
'from' indicates anagramming the letters (from the letters).
'tunis' anagrammed gives 'UNITS'.
(Other definitions for units that I've seen before include "Single items or standard quantities" , "Individual things, like pieces of furniture" , "Single things" , "military teams" , "Individual things or groups" .)