Be tenured, potentially offering security (9)
I believe the answer is:
debenture
'security' is the definition.
(I've seen this before)
'be tenured potentially' is the wordplay.
'potentially' is an anagram indicator (letters have the potential to spell a new word).
'be'+'tenured'='betenured'
'betenured' is an anagram of 'DEBENTURE'.
'offering' is the link.
(Other definitions for debenture that I've seen before include "Long-term security issued by a company" , "Long-term fixed interest security" , "IOU" , "kind of security" , "Company financial bond" .)