Mail Giant

[magpie]

9 d thwarts 7 ?r?s?e? thanx

[Lie-in King]

Crosses; Crushes... (?)

[Lie-in King]

Having checked Chambers Thesaurus, I prefer the first option -

thwart
v
frustrate, foil, defeat, hinder, hamper, impede, obstruct, block, balk, check, baffle, stop, prevent, oppose, cross, nobble colloq. stymie