Press particular management groups to act (5,3,6)
I believe the answer is:
tread the boards
'act' is the definition.
(to tread the boards is to act on the stage)
'press particular management groups' is the wordplay.
'press' becomes 'tread'.
'particular' becomes 'the' (referring to a particular example of something).
'management groups' becomes 'boards' (executive boards).
'tread'+'the'+'boards'='TREAD THE BOARDS'
'to' is the link.
(Other definitions for tread the boards that I've seen before include "act" , "Work as an actor" , "plays" , "What actors do" .)