Old chairman showing mother nothing (3)
I believe the answer is:
mao
'old chairman' is the definition.
'Mao' can be an answer for 'chairman' (I've seen this before). I am not sure about the 'old' bit.
'mother nothing' is the wordplay.
'mother' becomes 'ma' (Ma is another word for mother or mum).
'nothing' becomes 'o' (looks like zero - 0).
'ma'+'o'='MAO'
'showing' acts as a link.
Can you help me to learn more?
(Other definitions for mao that I've seen before include "Communist leader of China" , "The familiar Tse-Tung" , "Old Chinese "Chairman"" , "- Zedong, Chinese communist leader" , "Chinese statesman" .)