Salesperson with the Spanish was first to be disgusted (8)
I believe the answer is:
repelled
'be disgusted' is the definition.
(I've seen this in another clue)
'salesperson with the spanish was 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).
'was first' becomes 'led' (to lead is to go first).
'rep'+'el'+'led'='REPELLED'
'to' acts as a link.
(Other definitions for repelled that I've seen before include "revolted" , "Caused disgust" , "Driven back" , "Drove away" , "Fought off" .)