Person in Black Sea abroad catches old vessel (7)
I believe the answer is:
mourner
'person in black' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'sea abroad catches old vessel' is the wordplay.
'sea abroad' becomes 'mer' ('sea' in French).
'catches' means one lot of letters goes inside another.
'old' becomes 'o' (abbreviation).
'vessel' becomes 'urn' (urn is a type of container).
'o'+'urn'='ourn'
'mer' enclosing 'ourn' is 'MOURNER'.
Can you help me to learn more?
(Other definitions for mourner that I've seen before include "Someone attending a funeral" , "Person following the coffin" , "Funeral attender" , "One at a funeral" .)