Michigan radical stuck in the mud (5)
I believe the answer is:
mired
'stuck in the mud' is the definition.
(I've seen this before)
'michigan radical' is the wordplay.
'michigan' becomes 'mi' (state letters).
'radical' becomes 'red' (red can mean a communist).
'mi'+'red'='MIRED'
(Other definitions for mired that I've seen before include "Sunk in deep mud" , "Stuck in the mud" , "covered in muck" , "Bogged down" .)