Styx ferryman has tea with Howard (6)
I believe the answer is:
charon
'styx ferryman' is the definition.
'charon' can be an answer for 'ferryman' (ferryman of Hades in Greek myth). I am unsure of the 'styx' bit.
'tea with howard' is the wordplay.
'tea' becomes 'cha' (cha is a type of tea).
'with' says to put letters next to each other.
'howard' becomes 'Ron' (Ron Howard).
'cha'+'ron'='CHARON'
'has' acts as a link.
Can you help me to learn more?
(Other definitions for charon that I've seen before include "Ferryman who brought the souls of the dead across the river Styx" , "Ferryman of dead (Gk. myth)" , "Mythical ferryman of the river Styx" , "underground transporter" , "Mythical boatman of the River Styx" .)