Financial relief is calculated to a limited degree (6)
I believe the answer is:
fiscal
'financial' is the definition.
('fiscal' can be a synonym of 'financial')
'relief is calculated to a limited degree' is the wordplay.
'to a limited degree' says the answer is hidden in the clue (some but not all of the letters from the clue).
'FISCAL' can be found hidden inside 'relief is calculated'.
(Other definitions for fiscal that I've seen before include "Related to taxes" , "Of public revenues" , "To do with public revenue of califs" , "Such a drag" , "Califs (anag.)" .)