Pedestrian in control of the factory (3-2-3-4)
I believe the answer is:
run-of-the-mill
'pedestrian' is the definition.
(thesaurus)
'control of the factory' is the wordplay.
'control' becomes 'run' (I've seen this before).
'factory' becomes 'mill' (mill is a type of factory).
'run'+'of'+'the'+'mill'='RUN-OF-THE-MILL'
'in' is the link.
(Other definitions for run-of-the-mill that I've seen before include "Everyday" , "Mediocre" , "Bog standard" , "Ordinary" , "Unexceptional" .)