Exude, as charm (4)
I believe the answer is:
ooze
'exude as charm' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ooze that I've seen before include "Percolate" , "Leak - slimy mud" , "Flow out slowly or thickly" , "Emit" , "Mud at bottom of river" .)