Man carrying large pan (4)
I believe the answer is:
slam
'pan' is the definition.
(both can mean to criticise or attack)
'man carrying large' is the wordplay.
'man' becomes 'sam' ().
'carrying' is an insertion indicator.
'large' becomes 'L' (eg in clothes sizes).
'sam' placed around 'l' is 'SLAM'.
(Other definitions for slam that I've seen before include "big contract" , "Criticise - bang - very good result at bridge" , "Report of forcefully closing" , "Shut violently" , "Criticise - attack" .)