Cynic heartlessly keeping our redeveloped hotel for a squat (6)
I believe the answer is:
crouch
'for a squat' is the definition.
(to crouch is to squat down)
'cynic heartlessly keeping our redeveloped hotel' is the wordplay.
'heartlessly' says to hollow out the word (remove centre letters).
'keeping' indicates putting letters inside.
'redeveloped' is an anagram indicator.
'hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'cynic' with its middle taken out is 'cc'.
'our' anagrammed gives 'rou'.
'cc' placed around 'rou' is 'crouc'.
'crouc'+'h'='CROUCH'
(Other definitions for crouch that I've seen before include "Hunker down" , "Spurs footballer" , "Squat" , "shooter?" , "Adopt a low static position -- Essex river" .)