Lose maiden on Scottish island (6)
I believe the answer is:
mislay
'lose' is the definition.
(I know that mislay is a more specific form of lose)
'maiden on scottish island' is the wordplay.
'maiden' becomes 'm' (cricket abbreviation).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'scottish island' becomes 'islay' (island of the Hebrides).
'm'+'islay'='MISLAY'
(Other definitions for mislay that I've seen before include "Lose (an item)" , "Put in wrong place, lose temporarily" , "Put something aside and forget where" , "Temporarily not find" , "Lose track of" .)