Flexible cat lies awkwardly (7)
I believe the answer is:
elastic
'flexible' is the definition.
(I know that flexible can be written as elastic)
'cat lies awkwardly' is the wordplay.
'awkwardly' indicates an anagram.
'cat'+'lies'='catlies'
'catlies' anagrammed gives 'ELASTIC'.
(Other definitions for elastic that I've seen before include "Able to stretch" , "Like one across" , "Variable" , "Material that stretches" , "Flexible, adaptable" .)