A bit thick, weep about each mark (6)
I believe the answer is:
creamy
'a bit thick' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?
'weep about each mark' is the wordplay.
'weep' becomes 'cry' (synonyms).
'about' means one lot of letters goes inside another.
'each' becomes 'ea' (abbreviation).
'mark' becomes 'm'.
'ea'+'m'='eam'
'cry' going around 'eam' is 'CREAMY'.
Can you help me to learn more?
(Other definitions for creamy that I've seen before include "Emulsified" , "Thickly rich in texture" , "rich and white" , "Rich like best part of milk" , "A mercy (anag)" .)