Crossword Genius

Neck down covering for offspring of this? (7)

Ross

I believe the answer is:

swallow

I'm a little stuck... Click here to teach me more about this clue!

'neck down' is the definition.
'swallow' can be an answer for 'down' (both can mean to consume or eat). I'm unsure of the 'neck' bit.

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for swallow that I've seen before include "Songbird" , "Ingest - bird" , "Buy < and consume" , "flier" , "Migrating bird" .)

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