Sailor wilting under pressure finds missile (7)
I believe the answer is:
polaris
'missile' is the definition.
(I know that Polaris is a submarine-launched ballistic missile)
'sailor wilting under pressure' is the wordplay.
I cannot quite see how this works, but
an anagram of 'sailor' is 'olaris' which is present in the answer.
'pressure' could be 'p' (abbreviation) and 'p' is found in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'finds' acts as a link.
Can you help me to learn more?
(Other definitions for polaris that I've seen before include "Star useful for navigation" , "one belonging in the heavens" , "Star near the N pole of the heavens" , "weapon sailors unleash" , "star (non-movie)" .)