Way holy person is unassuming (6)
I believe the answer is:
modest
'unassuming' is the definition.
('modest' can be similar in meaning to 'unassuming')
'way holy person' is the wordplay.
'way' becomes 'mode' ('mode' can be a synonym of 'way'**).
'holy person' becomes 'st' (I've seen this in other clues).
'mode'+'st'='MODEST'
'is' acts as a link.
(Other definitions for modest that I've seen before include "Simple, humble" , "Not excessive in rating one's own achievements" , "Not having or showing pride" , "Free from pomp or affectation" , "Native of Vienna" .)