No. 1 Cryptic Crossword - Tuesday 17/07/18

It's easy when a measure has addition to start.
Site has end removed, and psyche added to be restful.
Casual Diane wears French green to change course.
Dismembered flying insect, has jumbled inclusion for decoration.
Birds' twig where the queen of heavy horses sits.
A shortened pacifier only has letter added to lose speech.
Corn merchant mixed to that is, produces ornate light.
God of fire is shortened, and added to tree for this characteristic.
Spell-maker loses her head
Spirit slang mixed with frost, results in being articulated.
Reversed GPs with missive, tell them off.
Untidy Colour with pigment missing repeats.
Shake head in direction.
Mixed-up friend is also a mountain.
Sped with troubled bet for small-talk.
A lair inset above results in religious leader.
Untidy contest leads to splash.