Pray for direction in tree (7)
I believe the answer is:
beseech
'pray' is the definition.
(beseech can mean to pray or beg)
'direction in tree' is the wordplay.
'direction' becomes 'se' (SE is an example).
'in' means one lot of letters goes inside another.
'tree' becomes 'beech' (beech is a kind of tree).
'se' inserted into 'beech' is 'BESEECH'.
'for' acts as a link.
(Other definitions for beseech that I've seen before include "request, urgently" , "Fervently ask (someone) for something" , "petition" , "Request earnestly" , "Beg earnestly, plead" .)