NY Times Crossword
September 11, 2018
Timothy Polin
(Title shown below)

The answers to the clues below will have something in common.

1. Shy girl
2. Optimist's eyewear
3. Full of energy and enthusiasm
4. Try to improve what is already beautiful

Answers:

1. Shrinking violet
2. Rose-colored glasses
3. Fresh as a daisy
4. Gild the lily 

Each answer contains the name of a flower.
Puzzle title: FLOWERY LANGUAGE