### Clue: Trendy article with Low Dutch in 4's 8 (2,3,4)
### Answer: IN THE MOOD 
 ### Explanation: Definition: 4's 8
 IN(trendy;in fashion) + THE(an article in grammar) **plus**(with) MOO(to low, as a cow does) + D(abbrev. for "Dutch").
Defn: Song recorded by Glenn Miller(answer to 4 down)'s band.