Related Clues:
- Mountain water is hard, giving stain
- Lose shine - a bit like a mountain lake?
- Lose colour, having partially collapsed after climbing
- Lose lustre
- Hasn't RI somehow become dull!
- (Of metal) lose lustre
- A mountain lake is hard to discolour
- Grow faint and disappear
- Trains ridiculously hard — it's not looking good for cup
- Stain bottom of post with gloss, not top
- Dim female given notice on fourth of June
- Like mere soil?
- Deaf (anag.)
- Film seen by a sailor mid-evening is hot!
- It's black on a silver background