Queen visiting British Museum and bank (4)
I believe the answer is:
berm
'bank' is the definition.
(thesaurus)
'queen visiting british museum' is the wordplay.
'queen' becomes 'er' (abbreviation for Elizabeth Regina).
'visiting' means one lot of letters goes inside another.
'british museum' becomes 'bm' (**).
'er' placed into 'bm' is 'BERM'.
'and' is the link.
(Other definitions for berm that I've seen before include "Sand embankment; narrow path" , "Raised bank" , "defence during the war" .)