Liberal leader's cagey about inheritance (6)
I believe the answer is:
legacy
'inheritance' is the definition.
(I know that legacy is a type of inheritance)
'liberal leader's cagey about' is the wordplay.
'leader' indicates taking the first letters.
'about' is an anagram indicator.
The first letter of 'liberal' is 'l'.
'cagey' is an anagram of 'egacy'.
'l'+'egacy'='LEGACY'
(Other definitions for legacy that I've seen before include "Money left" , "Heritage" , "Inheritance" , "What's left" , "Gift left in will" .)