Black mark for a chap getting out of line (5)
I believe the answer is:
stain
I believe this clue is a quadruple definition!!
'black' is the first definition.
(thesaurus)
'mark' is the second definition.
(synonyms)
'for' acts as a link.
'a chap getting' is the third definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'out of' acts as a link.
'line' is the fourth definition.
(thesaurus)
Can you help me to learn more?
(Other definitions for stain that I've seen before include "Dirty mark; dye" , "Blemish; colour (wood)" , "Smear" , "Black mark for saint" , "Stigma" .)