Turtle's hangout (4)
I believe the answer is:
nest
'turtle's hangout' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for nest that I've seen before include "A set (of tables)" , "Rook's residence?" , "Snuggle in like bird" , "Structure for laying eggs" , "Bird's house" .)