A huge cruise stop? (5)

I believe the answer is:

avast

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

'cruise stop?' is the definition.
'avast' can be an answer for 'stop?' (I've seen this before). I'm not certain of the 'cruise' bit.

'a huge' is the wordplay.
'huge' becomes 'vast' (I've seen this before).
'a'+'vast'='AVAST'

Can you help me to learn more?

(Other definitions for avast that I've seen before include "Hold fast! (naut.)" , "Stop sailing" , "Stop on board" , "eleven [CEASE] at sea" , "Stop! (naut.)" .)

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