Baby power, by the sound of it? (4)
I believe the answer is:
mite
'baby' is the definition.
The definition and answer can be both animals as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'power by the sound of it?' is the wordplay.
'power' becomes 'might' ('might' can be a synonym of 'power').
'by the sound of it?' shows a homophone (sound like).
'might' sounds like 'MITE'.
Can you help me to learn more?
(Other definitions for mite that I've seen before include "Minute arachnid" , "Minute creature" , "The widow's small offering" , "Tiny contribution, child" , "The Biblical widow's offering" .)