Period of time before one's members take a walk (7,4,4)
I believe the answer is:
stretch ones legs
'take a walk' is the definition.
(I've seen this before)
'period of time before one's members' is the wordplay.
I cannot quite understand how this works, but
'period' could be 'stretch' (stretch of time) and 'stretch' is located in the answer.
'of' could be 'o' and 'o' is found within the answer.
'members' could be 'legs' (leg is a kind of member) and 'legs' is found in the answer.
The remaining letters 'nes' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for stretch ones legs that I've seen before include "Take a walk for exercise" , "as Procrustes might do" , "stroll" , "Take a short walk" , "Go for a short walk" .)