3 reciting poem? (4)
I believe the answer is:
rime
'3' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'reciting poem?' is the wordplay.
'reciting' indicates a 'sounds like' (homophone) clue (I've seen 'recited' mean this).
'poem?' becomes 'rhyme' (rhyme is a kind of poem).
'rhyme' is a homophone of 'RIME'.
Can you help me to learn more?
(Other definitions for rime that I've seen before include "Ancient Mariner produced?" , "Type of frost" , "Hoar frost" , "Hoarfrost" , "dated poetry" .)