Crossword Genius

Require helping, left lying in quicksand (3)

Ross

I believe the answer is:

ask

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

'require' is the definition.
(I know that require is a more specific form of enjoin)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for ask that I've seen before include "Make enquiry" , "Issue invitations" , "Request, invite" , "Pose" , "Put a question" .)

I've seen this clue in the Sydney Morning Herald.
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