Tubes of paste (8)
I believe the answer is:
macaroni
This might be a double definition.
'tubes of' is the first definition.
'macaroni' can be an answer for 'tubes' (I've seen this before). I'm not certain of the 'of' bit.
'paste' is the second definition.
(macaroni is a kind of paste)
Can you help me to learn more?
(Other definitions for macaroni that I've seen before include "Pasta variety, eighteenth century dandy" , "Slender tubes of pasta" , "Type of pasta" , "Short narrow tubes of pasta" , "Italian food" .)