Pole inside grotto temporarily (5)
I believe the answer is:
totem
'pole' is the definition.
(I've seen this before)
'inside grotto temporarily' is the wordplay.
'inside' indicates the answer is hidden within the clue.
'TOTEM' is hidden in the letters of 'grotto temporarily'.
(Other definitions for totem that I've seen before include "Revered object" , "symbol of spiritual significance" , "Native American symbol" , "Spiritually significant emblem" , "Symbolic pole" .)