Goddess put off tackling Grecian (7)
I believe the answer is:
demeter
'goddess' is the definition.
(I've seen this before)
'put off tackling grecian' is the wordplay.
'put off' becomes 'deter' (both can mean to discourage).
'tackling' indicates putting letters inside (to tackle is to take possession of).
'grecian' becomes 'em' (I am not sure about this - if you are sure you should believe this answer much more).
'deter' placed around 'em' is 'DEMETER'.
Can you help me to learn more?
(Other definitions for demeter that I've seen before include "Ancient Greek deity of fertility" , "Olympian" , "Greek goddess of fertility - metered (anag)" , "Greek goddess of agriculture" , "Divine female" .)