Speak about pole that's embellished (6)
I believe the answer is:
ornate
'embellished' is the definition.
(synonyms)
'speak about pole' is the wordplay.
'speak' becomes 'orate' (orating is a kind of speaking).
'about' indicates putting letters inside.
'pole' becomes 'n' (abbreviation for North, as in North Pole).
'orate' enclosing 'n' is 'ORNATE'.
'that's' is the link.
(Other definitions for ornate that I've seen before include "Are not (anag.)" , "Detailed" , "Heavily decorated" , "Elaborate, flowery" , "Highly decorative" .)