Crossword Genius

Be too tired to keep up? (4,6)

Ross

I believe the answer is:

fall asleep

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

This might be a double definition.

'be too tired' is the first definition.

'keep up?' is the second definition.
The answer and definition can be both related to bodily activities as well as being verbs in their base form.
Perhaps there's a link between them I don't understand?

'to' acts as a link.

Can you help me to learn more?

I've seen this clue in The Globe and Mail.
Want a hint initially instead of a full solution? Install my app