Small creature producing grand repeated sound, as we may hear it (5)
I believe the answer is:
gecko
'small creature' is the definition.
(geckos are small lizards)
'grand repeated sound as we may hear it' is the wordplay.
'grand' becomes 'g' (G is short for grand as in a thousand).
'repeated sound' becomes 'echo' (I've seen this before).
'as we may hear it' shows a homophone (sound like).
'echo' sounds like 'ecko'.
'g'+'ecko'='GECKO'
'producing' is the link.
(Other definitions for gecko that I've seen before include "Lizard with adhesive toes" , "one climbing the walls?" , "Small lizard with adhesive foot-pads" , "Type of lizard" , "Cold-blooded creature" .)