1) Behind the curtain 2) Concealed 3) Exclusively Saxon word 4) Exclusively Anglo word 5) Hidden 6) Hidden from view 7) Invisible 8) Like a voice-over giver 9) Like harvey 10) Like many a narrator 11) Like many narrators 12) Like Miss Othmar in Peanuts 13) Like pitfalls 14) Like puppeteers, usually Found on https://www.crosswordclues.com/clue/unseen
[website] Unseen is an online marketplace for erotic art. It does not produce nor commission any of the artworks featured on its site. Rather, it provides an eCommerce infrastructure enabling the hosting and sale of the erotica artworks authored by individual artists, which Unseen calls `grassroots erotica.” The content ranges widely, spa... Found on http://en.wikipedia.org/wiki/Unseen_(website)
HMS Unseen was a British Ursula Class submarine of 540 tons displacement launched in the early 1940s. She was armed with one small gun and six 21-inch torpedo tubes in the bow. She had a top speed of 11.25 knots surfaced and 10 knots submerged and carried a complement of 27. Found on http://www.probertencyclopaedia.com/browse/RU.HTM
not seen; unperceived; unobserved; invisible. · recognized or comprehended without prior study, as a written text or musical score. Found on https://www.infoplease.com/dictionary/unseen