Confused ostrich losing way in part of church (5)
I believe the answer is:
choir
'part of church' is the definition.
(part of a church where a choir sits)
'confused ostrich losing way' is the wordplay.
'confused' indicates anagramming the letters.
'losing' suggests deleting specific letters.
'way' becomes 'st' (abbreviation for street).
'ostrich' with 'st' removed is 'orich'.
'orich' anagrammed gives 'CHOIR'.
'in' is the link.
(Other definitions for choir that I've seen before include "People in church" , "Band of singers" , "Chorus in church" , "Singers in harmony" , "Organised group of singers" .)