President at bar, next to a flower arrangement (7)
I believe the answer is:
ikebana
'flower arrangement' is the definition.
(I've seen this before)
'president at bar next to a' is the wordplay.
'president' becomes 'ike' (nickname of Dwight Eisenhower).
'at' says to put letters next to each other.
'bar' becomes 'ban' (I've seen this before).
'next to' means one lot of letters go next to another.
'ike'+'ban'+'a'='IKEBANA'
(Other definitions for ikebana that I've seen before include "Art of Japanese flower arrangement" , "arrangement of flowers" , "craft" , "exhibiting array of bloomers" , "artistic arrangement" .)