Spooner’s sprite put on tissue clump? (5,4)

'clump?' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.

'spooner's sprite put on tissue' is the wordplay.
'spooner's sprite' becomes 'lymph' (I can't explain this - if you can you should give a lot more credence to this answer).
'put on' means one lot of letters go next to another.
'tissue' becomes 'node' (node is a kind of tissue).
'lymph'+'node'='LYMPH NODE'

Can you help me to learn more?