Pious Oriental quintet seen after day out (6)
I believe the answer is:
devout
'pious' is the definition.
(synonyms)
'oriental quintet seen after day out' is the wordplay.
'oriental' becomes 'e'.
'quintet' becomes 'V' (Roman numeral for 5 - quintet is a group of five).
'seen after' says to put letters next to each other.
'day' becomes 'd' (abbreviation for day).
'e'+'v'='ev'
'ev' after 'd' is 'dev'.
'dev'+'out'='DEVOUT'
(Other definitions for devout that I've seen before include "Pious, earnestly religious" , "Religiously observant" , "Religiously committed" , "Deeply religious" , "Reverent" .)