In British hotel, he asks drunk about European tip (9)
I believe the answer is:
baksheesh
'tip' is the definition.
(Persian word for a tip or donation)
'in british hotel he asks drunk about european' is the wordplay.
I cannot really understand how this works, but
'british' could be 'b' (abbreviation e.g. in 'BBC') and 'b' is found in the answer.
'hotel' could be 'h' (phonetic alphabet: alpha, bravo, charlie etc.) and 'h' is located in the answer.
'he' could be 'see' and 'see' is located in the remaining letters.
'about' could be 'a' (abbreviation in Chambers) and 'a' is found within the answer.
This explanation may well be incorrect...
(Other definitions for baksheesh that I've seen before include "Small amount given for services rendered" , "Gratuity or tip in Middle East" , "(Oriental) money given as a tip or alms" , "Gift of money" .)