19 across
Book
launch
finally
having
a
lot
of
similar
military
material
(5)
Book launch finally having a lot of similar military material (5)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
The military material here is that classic soldierly cloth. Take the final letters of "Boo-K" and "launc-H" (that "finally" tips us off), then add "a lot of" AKIN (meaning similar) with its last letter dropped to leave AKI. Stick KH and AKI together and you get KHAKI.