A pulsating piece of stuff (5)
I believe the answer is:
satin
'stuff' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'a pulsating piece' is the wordplay.
'piece' says the answer is hidden in the clue.
'SATIN' can be found hidden inside 'pulsating'.
'of' is the link.
Can you help me to learn more?
(Other definitions for satin that I've seen before include "Silky material" , "Glossy textile" , "Smooth and silky" , "Fine material" , "Material with glossy front and dull back" .)