A huge cruise stop? (5)
I believe the answer is:
avast
'cruise stop?' is the definition.
'avast' can be an answer for 'stop?' (I've seen this before). I am not sure about 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.)" .)