Clockwerk is a melee strength initiator and ganker. He is one of the most popular offlane heroes in both competitive Dota and public matchmaking thanks to his superior creep control, relative item independence, good defensive abilities, and the ability to gank other lanes as soon as he hits level 6.
Skills
Battery Assault is usually skilled second and almost always maxed first.
Power Cogs is skilled first but maxed last.
Rocket Flare is skilled last but maxed second.
Hookshot is always skilled (levels 6, 11 and 16).
Items
Starting Items: Tangos, Healing Salve, Stout Shield, 2x Iron Branches.
Early Game: Boots of Speed, Bottle, Magic Wand, Bracer (optional).
Core Options: Phase Boots of Power Treads. Drums of Endurance or Force Staff, or Aghanim's Scepter, or Blade Mail.
Luxury Items: Ghost Scepter, Black King Bar, Heaven's Halberd, Shiva's Guard, Assault Cuirass, Heart of Tarrasque.
Situational Items: Dust of Appearance, Gem of True Sight (vision), Necronomicon (pushing), Vladmir's Offering (melee utility), Mekanism, Crimson Guard, Pipe of Insight, Boots of Travel (late game), Linken's Sphere.