Canals And Rivers In The British Isles

[Yellowbird]

Colour stops first note in reverse? (6)
Top of the trees? (4, 6)
Is there a circus act locally? (4)

[Davemano]

2 Peak Forest Canal is a narrow (7-foot (2.13 m) gauge) locked artificial waterway in northern England.

[scorpiojo]

1 Hodder, doh, red reversed.

[Yellowbird]

Thank you Davemano and scorpions for your answers x

[Davemano]

3 I wonder if this could relate to a circus ring.
A canal ring is the name given to a series of canals that make a
complete loop. ??