5d. Light visible during a solar eclipse due to the Moon's rough surface (6 & 5 ltrs). B-I-Y-/B-A-S
Also I thought 10d would be Lah De Dah but the only thing that fits is Lah Di Dah? Could it be either? Sorry the clue is Exaggeratedly genteel, like Gunner Graham in It Ain't half hot mum? (3 & 2 & 3)