Gullible person (3)
'gullible person' is the definition.
(mug can mean a gullible or foolish person)
This is all the clue.
(Other definitions for mug that I've seen before include "Drinking vessel for one easily deceived" , "Fool - face - vessel" , "Drinking vessel, by gum" , "Large cup without a saucer" , "simpleton" .)
'gullible person' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sap that I've seen before include "dig tunnels" , "Charlie" , "Moisture in wood of a tree" , "Imbecile" , "tunnel" .)