Truly divine nursing home in the sticks? (8)
I believe the answer is:
honestly
'truly' is the definition.
(thesaurus)
'divine nursing home in the sticks?' is the wordplay.
'divine' becomes 'holy' (I've seen this in another clue).
'nursing' indicates putting letters inside.
'home in the sticks?' becomes 'nest' (I've seen this in another clue).
'holy' enclosing 'nest' is 'HONESTLY'.
(Other definitions for honestly that I've seen before include "On the sly (anag.)" , "In a fair-dealing way" , "In a truthful way" , "Really; truthfully" , "Truly, without a word of a lie" .)