Discovered one of crew coming round queasy - quiet below deck! (9)
I believe the answer is:
embellish
'deck' is the definition.
(I've seen this before)
'discovered one of crew coming round queasy quiet below' is the wordplay.
I cannot really see how this works, but
'one' could be 'i' (Roman numeral) and 'i' is located in the answer.
'quiet' could be 'sh' (both can be said to tell someone to be quiet) and 'sh' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for embellish that I've seen before include "Add false details" , "He bills me so as to improve or decorate" , "Ornament, decorate" , "Enhance" , "Improve story by adding invented details" .)