Blessed cooking salt in supply, finally (7)
I believe the answer is:
saintly
'blessed' is the definition.
(thesaurus)
'cooking salt in supply finally' is the wordplay.
'cooking' indicates anagramming the letters (cook can mean to falsify or distort).
'finally' suggests the final letters.
The last letter of 'supply' is 'y'.
'salt'+'in'='saltin'
'saltin' is an anagram of 'saintl'.
'saintl'+'y'='SAINTLY'
(Other definitions for saintly that I've seen before include "good!" , "Beatific" , "Very virtuous" , "Very holy" .)