Disgusted salesperson with the Spanish went first (8)
I believe the answer is:
repelled
'disgusted' is the definition.
('repel' can be a synonym of 'disgust')
'salesperson with the spanish went first' is the wordplay.
'salesperson' becomes 'rep' (sales rep).
'with' says to put letters next to each other.
'the spanish' becomes 'el' ('the' in Spanish).
'went first' becomes 'led' (I've seen this in another clue).
'rep'+'el'+'led'='REPELLED'
(Other definitions for repelled that I've seen before include "Forced or drove back" , "Fought off" , "Drove away" , "Disgusted or drove back" , "Drove something or someone back" .)