Go out more? Missing Yankee’s not spotted (9)
I believe the answer is:
stainless
'spotted' is the definition.
Both the definition and answer are adjectives. Maybe you can see a link between them that I can't see?
'go out more? missing yankee's not' is the wordplay.
'go out more? missing yankee' becomes 'stain' (I am not sure about this - if you are sure you should believe this answer much more).
'not' becomes 'less' (I've seen this in other clues).
'stain'+'less'='STAINLESS'
Can you help me to learn more?
(Other definitions for stainless that I've seen before include "Squeaky-clean" , "Unmarked" , "Not liable to tarnish" , "Resistant to marking" , "Immaculate" .)