Pearl having bit of Edna cremated (5)
I believe the answer is:
nacre
'pearl' is the definition.
(nacre is another name for mother-of-pearl)
'bit of edna cremated' is the wordplay.
'bit of' says the answer is hidden in the clue.
'NACRE' can be found hidden inside 'edna cremated'.
'having' is the link.
(Other definitions for nacre that I've seen before include "Mother of pearl" , "Constituent of inlay furniture" , "Pearl's mum" , "inside of shell" , "valuable material" .)