Goa's very disrupted by travellers (8)
I believe the answer is:
voyagers
'travellers' is the definition.
(voyager is a kind of traveller)
'goa's very disrupted' is the wordplay.
'disrupted' indicates an anagram.
'goas'+'very'='goasvery'
'goasvery' with letters rearranged gives 'VOYAGERS'.
'by' is the link.
(Other definitions for voyagers that I've seen before include "Travellers" , "People making long sea journeys" , "Those on a sea journey" , "Holidaymakers" .)