Clarification would be appreciated for the following......
17A Cornish mining area regulated tin, in being cleared (4)
I've got ?ETT - assuming it's probably nett - can anyone explain why or put me right.
25D Borders, merely edged by gravel ridge? (5)
??UTS - thinking abuts which requires as to mean gravel ridge - is this a variant of os?
27A Scotch drinker, i.e. S cot? (7, 2 words)
SAN??E? looks like "sand bed" but cannot fathom it.
Thanks in advance
ixion