Crossword puzzle clue "it may be worn under a sweater"

It may be worn under a sweater

It may not be worn when it's worn

Cynical Bierce who defined "sweater" as "Garment worn by child when its mother is feeling chilly"

Irish sweater worn by fishermen

Undergarment worn beneath a sweater

It may be worn under a tunicle

It may be worn under a tennis shoe

A choli may be worn under this