A stretch of picturesque alfalfa grass (6)

I believe the answer is:

squeal

'grass' is the definition.
(thesaurus)

'a stretch of picturesque alfalfa' is the wordplay.
'a stretch of' indicates a hidden word (a stretch of letters from the clue).
'SQUEAL' is hidden within 'picturesque alfalfa'.

(Other definitions for squeal that I've seen before include "Inform (as a pig would?)" , "Spill the beans" , "Equals (anag)" , "Rat on" , "Make shrill cry like stuck pig" .)

I've seen this clue in The Independent.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.