Drone crashed by Avtaar gets flattened (6)
I believe the answer is:
ironed
'flattened' is the definition.
(I've seen this before)
'drone crashed by avtaar' is the wordplay.
'crashed' indicates an anagram.
'by' says to put letters next to each other.
'avtaar' becomes 'I' (where the crossword setter is 'Avtaar').
'drone' is an anagram of 'roned'.
'roned' after 'i' is 'IRONED'.
'gets' is the link.
(Other definitions for ironed that I've seen before include "Got rid of creases" , "Decreased?" , "Removed creases" , "Smoothed out wrinkles" , "Made smooth, shirt or collar" .)