Fearing hell, art extraordinarily exaggerated (6,4,4)
I believe the answer is:
larger than life
'exaggerated' is the definition.
(I've seen this before)
'fearing hell art extraordinarily' is the wordplay.
'extraordinarily' indicates anagramming the letters.
'fearing'+'hell'+'art'='fearinghellart'
'fearinghellart' is an anagram of 'LARGER-THAN-LIFE'.
(Other definitions for larger than life that I've seen before include "very imposing" , "circulation claim by another old American magazine?" , "Exaggerated" , "Extravagant" .)