Puzzle 4

A diet without gluten.

Delicate part of a Valentine's flower.

Holiday when actor Michael Landon was born.

Not safe, like Glenn Close's Liaisons movie.

Plant scientists.

Sleeveless aprons.

Something brief and impermanent.

Song sung by naval seafarers of the past.

Song sung by sailors of the past.

South American country; name means "silver".

U-shaped body of water.

Vehicle warming system devised by Margaret Wilcox.

Wilkie Collins crime novel about jewels, The __.