Heather Lake's underwear (8)
I believe the answer is:
Here is my best explanation:
'underwear' is the definition.
(lingerie is a kind of underwear)
'heather lake's' is the subsidiary indication.
'heather' becomes 'ling' ('ling' can be a synonym of 'heather').
'lake' becomes 'erie' (Lake Erie is one of the Canadian/US 'Great Lakes').
(Other definitions for lingerie that I've seen before include "Female underwear", "Ladies' underwear", "Women's flimsy underwear", "Women's underwear and nightwear", "Women's underwear and nightclothes", "Scanties", "flimsy stuff", "Garments", "CLOTHING" and "pants! Could be".)