Westbound, setting sail with a sick feeling (7)
I believe the answer is:
malaise
'feeling' is the definition.
(I have seen 'Feeling of discomfort' mean 'malaise' so perhaps 'feeling' could also mean 'malaise')
'westbound setting sail with a sick' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'sail' is 'lais' which is present in the answer.
'a' is present in the answer.
The remaining letters 'me' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for malaise that I've seen before include "General feeling of discomfort" , "depression" , "Unease; lethargy" , "Uneasy feeling" , "General feeling of unease or illness" .)