First to obey Catholic, tough, with area of fruit trees (7)
I believe the answer is:
orchard
'area of fruit trees' is the definition.
(I've seen this before)
'first to obey catholic tough' is the wordplay.
'first to' suggests taking the first letters.
'catholic' becomes 'RC' (abbreviation for Roman Catholic).
'tough' becomes 'hard' (synonyms).
The initial letter of 'obey' is 'o'.
'o'+'rc'+'hard'='ORCHARD'
'with' acts as a link.
(Other definitions for orchard that I've seen before include "Fruit grove" , "Enormous" , "Group of fruit trees" , "Area with fruit trees" , "Field of fruit trees" .)