Dental problem? Stick on black lubricant (7)
I believe the answer is:
gumboil
'dental problem?' is the definition.
The answer and definition can be both states of affairs as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'stick on black lubricant' is the wordplay.
'stick' becomes 'gum' (I've seen this before).
'on' means one lot of letters go next to another.
'black' becomes 'b' (as in pencil classifications).
'lubricant' becomes 'oil' (I've seen this before).
'gum'+'b'+'oil'='GUMBOIL'
Can you help me to learn more?
(Other definitions for gumboil that I've seen before include "Swelling in the mouth" , "Small abscess of the mouth" .)