Related Clues:
- Dry month, following one the same except for the middle
- Barren, dull, unnourishing
- Not a very interesting Constable?
- Lacking excitement
- Matt
- Matt; overcast
- Judge English summer month dull
- Naive, simplistic
- Boring day for classes at Eton, say - double Latin
- Grey is boring
- Lacklustre
- Uninteresting and lacking polish
- Drab
- Pointless if it's cloudy
- Regularly double line means 'slow-moving'