Order - it's returned by woman beside loch (8)
I believe the answer is:
tidiness
'order' is the definition.
(tidiness is a kind of order)
'it's returned by woman beside loch' is the wordplay.
'returned' says the letters should be written in reverse.
'by' says to put letters next to each other.
'woman' becomes 'Di' (short for Diana).
'beside' means one lot of letters go next to another (I've seen this in other clues).
'loch' becomes 'ness' (Loch Ness in Scotland).
'it' written backwards gives 'ti'.
'ti'+'di'+'ness'='TIDINESS'
(Other definitions for tidiness that I've seen before include "sense of order" , "Orderly quality" , "Insisted on neatness." , "good order" , "Quality of neatness and orderliness" .)