Eke out the bit of porridge (7)
I believe the answer is:
stretch
'bit of porridge' is the definition.
'stretch' can be an answer for 'bit' (I have seen 'Bit of exercise' mean 'stretch' so perhaps 'bit' could also mean 'stretch'). I'm unsure of the 'of porridge' bit.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for stretch that I've seen before include "sort of limousine" , "Strain" , "time spent in jail" , "Draw out" , "Make demands on; lengthen" .)