Dismal piece from Nyman? Took the piss about that! (9)
I believe the answer is:
saturnine
'dismal piece from nyman? took the piss about that' is the definition.
'saturnine' can be an answer for 'dismal' (I've seen this before). I'm unsure of the rest of the definition.
'nyman? took the piss about that' is the wordplay.
'nyman?' becomes 'n' (this might be a standard abbreviation I've not previously seen).
'took' becomes 'sat' (sit can mean to take an exam).
'the piss' becomes 'urine' (synonyms).
'about that' means one lot of letters goes inside another.
'sat'+'urine'='saturine'
'n' put inside 'saturine' is 'SATURNINE'.
Can you help me to learn more?
(Other definitions for saturnine that I've seen before include "Morose looking" , "may be brooding" , "dull" , "A rust nine chnage to be grave and gloomy" , "moody" .)