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Across

One of a pair of long straps (usually connected to the bit or the headpiece) used to control a horse (4)
A tremor (or one of a series of tremors) occurring after the main shock of an earthquake (10)
10 Out of fashion (3-3)
11 The state of inactivity following an interruption (8)
12 Shed tears because of sadness or pain (4)
13 Hold as reserve or withdraw from circulation; of capital (10)
17 A heavy dull sound (as made by impact of heavy objects) (4)
18 Usually paved outdoor area adjoining a residence (5)
19 Made by turning under or folding together and stitching the seamed materials to avoid rough edges (4)
20 Pretentiously artistic; cloyingly charming (4-6)
22 A notice of someone's death; usually includes a short biography (4)
23 Get on top of; deal with successfully (8)
27 An appraisal of the value of something (6)
28 An officer who acts as military assistant (4-2-4)
29 Pale gray; ash-colored (4)

Down

Someone who assumes leadership of a movement or activity (10)
Incompletely or imperfectly shaped (8)
One who takes a trip during the day without an overnight stop. (10)
Type genus of the Otididae: European bustard (4)
The cardinal number that is the sum of one and one and one (4)
A place of worship that has its own altar (6)
A morphine derivative (4)
14 A design that consists of recurring shapes or colors (5)
15 An explosive mine hidden underground; explodes when stepped on or driven over (10)
16 After billionth (10)
19 A person used as a cover for some questionable activity (5,3)
21 Cry loudly, as of animals (6)
24 A powerful operating system developed at the Bell Telephone Laboratories (4)
25 The chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics (4)
26 The process of heating to change something from a solid to a liquid (4)

Solution