Crossword Genius

Told Porky to have a rest (3,4)

Ross

I believe the answer is:

lie down

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

'have a rest' is the definition.
(I've seen this before)

'told porky' is the wordplay.
I cannot really understand how this works, but
'porky' could be 'lie' (I've seen this in other clues) and 'lie' is located in the answer.
The remaining letters 'down' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

'to' acts as a link.

Can you help me to learn more?

(Other definitions for lie down that I've seen before include "Take rest; be submissive (under)" , "Rest in a horizontal position" , "joining rest" , "Short rest on a bed" , "Enid Low (anag.)" .)

I've seen this clue in The Sun.
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