Like hot butter in retreat? (6)
I believe the answer is:
ashram
'retreat?' is the definition.
(type of religious retreat)
'like hot butter' is the wordplay.
'like' becomes 'as'.
'hot' becomes 'h' (abbreviation eg on taps).
'butter' becomes 'ram' (I've seen this in another clue).
'as'+'h'+'ram'='ASHRAM'
'in' acts as a link.
(Other definitions for ashram that I've seen before include "Place of religious retreat for Hindus" , "religious community" , "Hindu place of religious learning located in a marsh" , "Hindu retreat house" , "etreat" .)