Related Clues:

• Increase, as the pot
• Include in, as a recipe
• Business outfit
• Be apropos to
• Zoot ___
• Jacket and trouser set
• Formal wear for men in clubs, say
• C, D, H or S
• Case for diamonds, perhaps
• It's noted for giving air support, sometimes
• Cancan tempo I'm getting wrong in music played on piano maybe
• Part of pack (of cards)
• Action in match
• Eg, spades
• Something subsidiary that is added