Kind of pipe from the centre of the ear (7)
I believe the answer is:
corncob
This clue could be a double definition.
'kind of pipe from the centre' is the first definition.
'corncob' can be an answer for 'centre' (corncob is a kind of centre). I am unsure of the 'kind of pipe from the' bit.
'the ear' is the second definition.
(I have seen 'Ear of maize' mean 'corncob' so perhaps 'ear' could also mean 'corncob')
'of' acts as a link.
Can you help me to learn more?
(Other definitions for corncob that I've seen before include "Smoked" , "Head of maize" , "Core of ear of maize" , "Source of a yellow vegetable" , "Middle of ear" .)