Bequest includes, say, tatting covers (6)
I believe the answer is:
legacy
'bequest' is the definition.
(I know that bequest can be written as legacy)
'say tatting covers' is the wordplay.
'say' becomes 'eg' (both can mean for example).
'tatting' becomes 'lacy' (I am not sure about this - if you are sure you should believe this answer much more).
'covers' indicates putting letters inside.
'eg' inserted inside 'lacy' is 'LEGACY'.
'includes' is the link.
Can you help me to learn more?
(Other definitions for legacy that I've seen before include "Sort of gift" , "estate?" , "Bombay since 1995" , "Gift left in will" , "That which is handed down by a predecessor" .)