Europeans on vacation head for bar (5)
I believe the answer is:
estop
'bar' is the definition.
(I've seen this before)
'europeans on vacation head' is the wordplay.
'on vacation' says to hollow out the word (remove centre letters).
'head' becomes 'top' (synonyms).
'europeans' with its centre removed is 'es'.
'es'+'top'='ESTOP'
'for' acts as a link.
(Other definitions for estop that I've seen before include "Preclude certain evidence (at law) - bar (archaic)" , "Hinder, preclude (law)" , "Legally prevent" , "lawyer's bar" , "term in law" .)