Back in Idaho landlord's welcome (5)
I believe the answer is:
aloha
'welcome' is the definition.
(I've seen this before)
'back in idaho landlord's' is the wordplay.
'back' says the letters should be written backwards.
'in' indicates a hidden word.
'ahola' can be found hidden inside 'idaho landlords'.
'ahola' reversed gives 'ALOHA'.
(Other definitions for aloha that I've seen before include "Hawaiian hello or goodbye" , "A Hawaiian welcome" , "Hello or goodbye in Hawaii" , "Hello from Honolulu?" , "Hawaiian "ciao"" .)