Expel the Spanish in Belgium and Switzerland (5)
I believe the answer is:
belch
'expel' is the definition.
(thesaurus)
'the spanish in belgium and switzerland' is the wordplay.
'the spanish' becomes 'el'.
'in' indicates putting letters inside.
'belgium' becomes 'b' (international vehicle registration code).
'and' says to put letters next to each other.
'switzerland' becomes 'ch'.
'b'+'ch'='bch'
'el' going into 'bch' is 'BELCH'.
(Other definitions for belch that I've seen before include "Forcibly expel" , "Vent air from the stomach through the mouth" , "Expel (smoke) forcefully" , "Burp" , "Violently eject" .)