Endlessly daring language rattled protective figure (8,5)
I believe the answer is:
guardian angel
'protective figure' is the definition.
(a guardian angel might watch over you)
'endlessly daring language rattled' is the wordplay.
'endlessly' means to remove the last letter.
'rattled' indicates an anagram.
'daring' with its final letter removed is 'darin'.
'darin'+'language'='darinlanguage'
'darinlanguage' with letters rearranged gives 'GUARDIAN ANGEL'.
(Other definitions for guardian angel that I've seen before include "spirit of helpfulness" , "Person keeping an eye on one's safety (including a newspaper)" , "Protector (ours?) - city vigilante" , "Person concerned with the welfare of another" , "Benevolent spirit" .)