Without the given letters, Tilly, I would have gone for opal. Have you done Mr Fautley's puzzle yet? Last week's did not take that long - this week's - even less!
I just assumed the letters were wrong, Flonska. :-)
No, not got round to the puzzle yet. I haven't done it for a couple of weeks as I have been too busy. I have a bit more time now so will have a look later. Thank you.