Put under the way in! (8)
I believe the answer is:
entrance
This clue is a double definition.
'put under' is the first definition.
(thesaurus)
'the way in' is the second definition.
(I've seen this in another clue)
(Other definitions for entrance that I've seen before include "Ingress" , "doorway" , "seventeen [POSTERN], perhaps" , "drawbridge?" , "Captivate on way in ?" .)