Squirrels' homes (5)
I believe the answer is:
trees
'squirrels' homes' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for trees that I've seen before include "Woods" , "Tall, perennial, woody plant" , "Elms, pines etc" , "Steer into the plants" , "Components of forest" .)