Perfume from far Oman (5)
I believe the answer is:
aroma
'perfume' is the definition.
('aroma' can be a synonym of 'perfume')
'from far oman' is the wordplay.
'from' indicates a hidden word.
'AROMA' can be found hidden inside 'far oman'.
(Other definitions for aroma that I've seen before include "Test of knowledge" , "Distinctive scent" , "Savour" , "Bouquet" , "Distinctive smell" .)