Sort of menu left next to a trolley in AE (1,2,5)
I believe the answer is:
a la carte
'sort of menu' is the definition.
'left next to a trolley in ae' is the wordplay.
'left' becomes 'l' (common abbreviation).
'next to' is a charade indicator (letters next to each other).
'trolley' becomes 'cart' (I've seen this in another clue).
'in' indicates putting letters inside.
'cart' inserted within 'ae' is 'acarte'.
'l' after 'a' is 'al'.
'al'+'acarte'='A LA CARTE'
(Other definitions for a la carte that I've seen before include "(Of menu) listing individual items" , "way of ordering things" , "Chosen from full menu" , "Type of menu" , "Alternative to 17 across" .)