### Clue: Chuck briefly dons excellent headgear (3,4)
### Answer: TOP HATS 
 ### Explanation: Definition: headgear 
 "toss"(to chuck) **minus its last letter**(briefly) **containing**(dons – I'm not sure if this indicator works – unless referring to underwear, of course) PHAT(excellent, from African-American slang, a corruption of "fat" in its positive sense of rich and abundant).  This is the one I couldn't parse.