Praying to find unusually gifted child (6,7)
I believe the answer is:
infant prodigy
'gifted child' is the definition.
'praying to find unusually' is the wordplay.
'unusually' is an anagram indicator.
'praying'+'to'+'find'='prayingtofind'
'prayingtofind' with letters rearranged gives 'INFANT PRODIGY'.
(Other definitions for infant prodigy that I've seen before include "junior mastermind" , "Mozart?" , "Young genius" , "Wonder child" .)