Scout leader seen in fake lashes (5)
I believe the answer is:
akela
'scout leader' is the definition.
(I've seen this before)
'in fake lashes' is the wordplay.
'in' indicates a hidden word.
'AKELA' can be found hidden inside 'fake lashes'.
'seen' is the link.
(Other definitions for akela that I've seen before include "Cub Scouts adult leader" , "Leader of group" , "Jungle Book wolf (Kipling)" , "Cub Scout pack leader" , "Leader of pack of Cub Scouts - she-wolf in "The Jungle Book"" .)