Woolly material primordial pouch hides from below (5)
I believe the answer is:
plaid
'woolly material' is the definition.
'plaid' can be an answer for 'material' (plaid is a kind of material). I am not sure about the 'woolly' bit.
'primordial pouch hides from below' is the wordplay.
'hides' indicates a hidden word.
'from below' is a reversal indicator (in a down clue, letters go up).
'dialp' can be found hidden inside 'primordial pouch'.
'dialp' reversed gives 'PLAID'.
Can you help me to learn more?
(Other definitions for plaid that I've seen before include "Scottish Highland fabric" , "Check fabric" , "Scotsman's cloth" , "Tartan-pattern cloth" , "Tartan cloth, part of Highland dress" .)