Blah Humbug

Across

The coldest season of the year (6)
(informal usage) a general feeling of boredom and dissatisfaction (5)
10 To improve or add to the strength, worth, beauty, of something (7)
11 Metal loops into which rider's feet go (7)
12 Ability to see something as funny (5)
14 Sleep lightly or for a short period of time (6)
15 To secure one thing to another (6)
17 The smallest or weakest animal in a litter (4)
18 A burden; an obligation; a difficult or disagreeable necessity (4)
20 Very scanty briefs for women or men (7)
21 Hindu discipline (4)
23 A sign of something about to happen (4)
25 Perversely irritable (6)
27 Likelihood that something will happen (6)
29 The 3rd planet from the sun (5)
32 Housing collectively; structures in which people are housed (7)
33 Sea animal related to whales (7)
34 Feelings or displays of sullen anger or irritability (5)
35 Used in the kitchen to dry dishes (6)

Down

Lacking kindness, pity, or compassion (7)
A vast treeless plain in the arctic regions (6)
A ridge of coral or rock in a body of water (4)
Place that runner must touch before scoring (4)
Extraterrestrial being (5)
Cut of meat (7)
An unusual lack of energy (8)
A fencing sword (4)
13 A lack of vitality (7)
14 Small marine crustacean with ten legs (6)
16 A sharp stab of pain (6)
19 Lack of _______ causes "winter blahs" (8)
22 A grandmother or woman who is no longer young (7)
24 Federal law enforcement officer (7)
26 Color resembling the hue of ripe lemons (6)
27 The sensation produced by low temperatures (4)
28 A coarse twilled cotton fabric used for uniforms (5)
30 Armor plate that protects the chest (4)
31 Cut a movie or tape (4)