Think "inside" as in "doing time" rather than indoors, then the last letter starts your 22a with a 4 letter word for a sharp dressed man around spanish "the" meaning to fool or decieve. Come back if you still dont get them.
DEEKAY.
20a. Short for raincoat(3} + owned by him (3) + just a second (2).
17d. Meaning to embrace, adopt or promote. European = "E", + partner = husband or wife.