Way of working restricting a chairman (3)
I believe the answer is:
mao
'chairman' is the definition.
(I've seen this before)
'way of working restricting a' is the wordplay.
'way of working' becomes 'mo' (I've seen this in other clues).
'restricting' indicates putting letters inside.
'mo' placed around 'a' is 'MAO'.
(Other definitions for mao that I've seen before include "Red" , "- Zedong, Chinese communist leader" , "Former Chinese Chairman" , "Chinese leader (d.nineteen seventy six)" , "Chinese statesman" .)