Flat -- and crooked? (5)
I believe the answer is:
lying
This clue is a double definition.
'flat' is the first definition.
(I've seen this before)
'crooked?' is the second definition.
(thesaurus)
'and' is the link.
(Other definitions for lying that I've seen before include "Spread out" , "So one can't stand" , "Prostrate -- prone" , "Prevaricating" , "Not straight" .)