Showman from Rhode Island breaking a promise, unfortunately (10)
I believe the answer is:
impresario
'showman' is the definition.
(an impresario funds or organises shows)
'rhode island breaking a promise unfortunately' is the wordplay.
'rhode island' becomes 'ri' (US postal abbreviation).
'breaking' indicates putting letters inside.
'unfortunately' indicates an anagram (a bad or unfortunate spelling).
'a'+'promise'='apromise'
'apromise' with letters rearranged gives 'impresao'.
'ri' placed inside 'impresao' is 'IMPRESARIO'.
'from' acts as a link.
(Other definitions for impresario that I've seen before include "theatre director" , "Stage promoter" , "artistic director" , "Theatrical entrepreneur" , "Arranger of concerts, etc" .)