Eastern money brings expression of disgust over time (4)
I believe the answer is:
baht
'eastern money' is the definition.
(currency of Thailand)
'expression of disgust over time' is the wordplay.
'expression of disgust' becomes 'bah' (as in 'bah humbug!').
'over' says to put letters next to each other (in a down clue, some letters go over others).
'time' becomes 't' (abbreviation).
'bah'+'t'='BAHT'
'brings' acts as a link.
(Other definitions for baht that I've seen before include "Asian money" , "18 across currency" , "Currency of Thailand" , "Tin" , "In Thailand ready" .)