Crouch to settle (5)
I believe the answer is:
squat
I believe this clue is a double definition.
'crouch' is the first definition.
(I know that crouch can be written as squat)
'settle' is the second definition.
(thesaurus)
'to' acts as a link.
(Other definitions for squat that I've seen before include "residence occupied" , "Short and dumpy; occupy building" , "Crouch - occupy a dwelling illegally - short and stocky" , "house-sit?" , "Building occupied illegally" .)