Tolerate European in pub (4)
I believe the answer is:
bear
'tolerate' is the definition.
(synonyms)
'european in pub' is the wordplay.
'european' becomes 'E' (abbreviation e.g. EU).
'in' means one lot of letters goes inside another.
'pub' becomes 'bar' (I've seen this before).
'e' inserted inside 'bar' is 'BEAR'.
(Other definitions for bear that I've seen before include "Show" , "Go" , "eg Pooh" , "stand" , "Carry - tolerate" .)