Sounds like directions if you're heading for Antrim to give to your younger brother, for example (4,4)

'sounds like directions if you're heading for antrim' is the definition.
I know nothing about this answer so I can't tell whether this works.

'give to your younger brother for example' is the wordplay.
I cannot quite understand how this works, but
'give' could be 'pass' (both can mean to hand something over) and 'pass' is found within the answer.
The remaining letters 'down' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

'to' acts as a link.

Can you help me to learn more?