Be clumsy when it comes to lying (6)
I believe the answer is:
sprawl
'to lying' is the definition.
(thesaurus)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for sprawl that I've seen before include "Sit in an ungainly manner" , "Sit lazily, with limbs spread wide" , "Spread out in ungainly way" , "Lie with arms and legs spread about loosely" , "Uncontrolled urban development" .)