Cricket score you heard raised, which retains The Ashes? (3)
I believe the answer is:
urn
'which retains the ashes?' is the definition.
(ashes might be kept in an urn)
'cricket score you heard raised' is the wordplay.
'cricket score' becomes 'nr' (I can't justify this - if you can you should give a lot more credence to this answer).
'heard' shows a homophone (sound like).
'raised' says the letters should be written in reverse (going up in a down clue).
'you' is a homophone of 'u'.
'nr'+'u'='nru'
'nru' back-to-front is 'URN'.
(Other definitions for urn that I've seen before include "Burial vase" , "A large vase, perhaps for holding ashes" , "Repository for ashes" , "Without cost; last word of Tempest" , "A large vase as for human ashes" .)