Straw hat (6)
'straw hat' is the definition.
(synonyms)
This is all the clue.
(Other definitions for boater that I've seen before include "(Of exercise) improving oxygen intake" , "Hat style" , "Sailor's straw hat" , "Hard flat straw hat, or person on water" , "sailor, perhaps" .)
'straw hat' is the definition.
(I know that straw hat can be written as Panama)
This is the entire clue.
(Other definitions for panama that I've seen before include "Central American state" , "Canal zone" , "A great canal or a straw hat" , "Country and straw hat" , "Canal state; hat" .)