Linger when covered with black stuff? (5)
I believe the answer is:
tarry
'linger' is the definition.
(synonyms)
'covered with black stuff?' is the wordplay.
'covered' becomes 'ry' (I can't justify this - if you can you should give a lot more credence to this answer).
'with' means one lot of letters go next to another.
'black stuff?' becomes 'tar' (tar is a black substance).
'ry' after 'tar' is 'TARRY'.
'when' is the link.
Can you help me to learn more?
(Other definitions for tarry that I've seen before include "Hang around" , "covered with dark liquid" , "Lag" , "Stay longer than intended" , "Wait" .)