Place of refuge where some industrialist retired (4)
I believe the answer is:
lair
'place of refuge' is the definition.
(hideout or place of refuge)
'some industrialist retired' is the wordplay.
'some' says the answer is hidden in the clue (some parts of the word are used).
'retired' is a reversal indicator.
'rial' is hidden in the letters of 'industrialist'.
'rial' written backwards gives 'LAIR'.
'where' acts as a link.
(Other definitions for lair that I've seen before include "Flashy man" , "Wild animals' habitation" , "animal refuge" , "office?" , "Rail about wild animal's home" .)