Pious Oriental quintet seen on day out (6)
I believe the answer is:
devout
'pious' is the definition.
('devout' can be a synonym of 'pious')
'oriental quintet seen on day out' is the wordplay.
'oriental' becomes 'e'.
'quintet' becomes 'v' ('V' can be a synonym of 'quintet').
'seen on' says to put letters next to each other.
'day' becomes 'd'.
'e'+'v'='ev'
'ev' put after 'd' is 'dev'.
'dev'+'out'='DEVOUT'
(Other definitions for devout that I've seen before include "Showing religious commitment" , "Sincerely religious" , "Deeply religious" , "Religiously committed" , "Pious, prayerful" .)