Lose track of minute Hebridean island (6)
I believe the answer is:
mislay
'lose track of' is the definition.
(I've seen this in another clue)
'minute hebridean island' is the wordplay.
'minute' becomes 'm' (abbreviation).
'hebridean island' becomes 'islay' (I've seen this before).
'm'+'islay'='MISLAY'
(Other definitions for mislay that I've seen before include "Lose track of" , "Temporarily not find" , "Be unable to find" , "Put something aside and forget where" , "Put in wrong place, lose temporarily" .)