Crossword Genius

Separate and don't arrive together (4,5)

Ross

I believe the answer is:

come apart

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

'separate' is the definition.
(I know that separate can be written as come apart)

'don't arrive together' is the wordplay.
I cannot really understand how this works, but
'arrive' could be 'come' (coming is a kind of arriving) and 'come' is found in the answer.
The remaining letters 'apart' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

'and' is the link.

Can you help me to learn more?

I've seen this clue in the Evening Standard.
Want a hint initially instead of a full solution? Install my app