1) Anon 2) Before long 3) By and by 4) By and by, to a bard 5) Pretty soon 6) Soon 7) Soon poetically 8) Soon, to spenser 9) Sooner than later 10) Soonish Found on https://www.crosswordclues.com/clue/erelong
Ere`long' adverb Before the ...apse of a long time; soon; -- usually separated, ere long . « A man, . . . following the stag, erelong slew him.» Spenser. « The world, erelong , a world of tears must weep.» Milton. Found on http://www.encyclo.co.uk/webster/E/62