Stretch cable picked up in spots (4)
I believe the answer is:
flex
'stretch cable' is the definition.
'flex' can be an answer for 'cable' (type of flexible electric cable). I am unsure of the 'stretch' bit.
'picked up in spots' is the wordplay.
'picked up in' shows a homophone (sound like).
'spots' becomes 'flecks' ('fleck' can be a synonym of 'spot').
'flecks' is a homophone of 'FLEX'.
Can you help me to learn more?
(Other definitions for flex that I've seen before include "Tighten - bend" , "Bendable cord" , "Insulated wire cable" , "Bend; insulated cable" , "Electric wire" .)