Puzzle about what American restaurant staff may do (5)
I believe the answer is:
rebus
'puzzle' is the definition.
(type of visual puzzle)
'about what american restaurant staff may do' is the wordplay.
'about' becomes 're' ('re' means regarding or about).
'what american restaurant staff may do' becomes 'bus' (bus can mean to remove dirty dishes in US English).
're'+'bus'='REBUS'
(Other definitions for rebus that I've seen before include "Puzzling device" , "Pictorial teaser" , "Word puzzle with pictures and letters" , "Problem" , "Picture and word puzzle" .)