Europeans in resort with terrible drains (9)
I believe the answer is:
spaniards
'europeans' is the definition.
(people from Spain)
'resort with terrible drains' is the wordplay.
'resort' becomes 'spa' (spa is a kind of resort).
'with' says to put letters next to each other.
'terrible' is an anagram indicator.
'drains' is an anagram of 'niards'.
'spa'+'niards'='SPANIARDS'
'in' is the link.
(Other definitions for spaniards that I've seen before include "Natives of Seville, say" , "Iberians" , "Pass dinar to Europeans" .)