In a position to be lying (7)
I believe the answer is:
situate
'in a position to be lying' is the definition.
I can't tell whether this definition defines the answer.
'in a position' is the wordplay.
I cannot really understand how this works, but
'a' is within the answer.
'position' could be 'sit' (sitting is a kind of positioning) and 'sit' is present in the answer.
The remaining letters 'ute' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for situate that I've seen before include "Locate" , "Place in a particular location" , "station" , "Position" , "put in context" .)