Good afternoon, John.
10ac. Definition - synonym of "imitation / fake".
Take a Scottish county / region (5)
replace the letters "an" with an abbreviation for a sweat-related hygiene problem.........
18d. Definition - synonym of "wayward",
Synonym of "windward" (relative direction) (2)
+ Synonym of "feel for" (4)
Hoping this helps!
Al Issner