Dress for lunch

All words relate to the concept of 'Dress for lunch'

Think about what these words have in common

The Spangram is a longer word (11 letters) that ties the theme together

Theme words range from 4 to 10 letters long

Watch for words starting with I, K, R

The Spangram might be a compound or phrase (11 letters total)

One word: I______ (7 letters, starts with 'I')

Another word: K______ (4 letters)

Also look for: R______ (9 letters)