Trendy suit - odd but appropriately placed (2,4)
I believe the answer is:
in situ
'appropriately placed' is the definition.
'trendy suit odd' is the wordplay.
'trendy' becomes 'in' ('in' can mean fashionable).
'odd' is an anagram indicator.
'suit' is an anagram of 'situ'.
'in'+'situ'='IN-SITU'
'but' acts as a link.
(Other definitions for in situ that I've seen before include "As originally located" , "Appropriately located" , "Latin meaning 'on site'" , "correctly positioned" , "Occupying the original or appropriate position" .)