Horse and cart ordered for a band (9)
I believe the answer is:
orchestra
'a band' is the definition.
(thesaurus)
'horse and cart ordered' is the wordplay.
'and' says to put letters next to each other (I've seen this in other clues).
'ordered' is an anagram indicator.
'horse' after 'cart' is 'carthorse'.
'carthorse' anagrammed gives 'ORCHESTRA'.
'for' acts as a link.
(Other definitions for orchestra that I've seen before include "eg Halle" , "Noted performers" , "Big band" , "Group of musical instrumentalists" , "Large musical group" .)