### Clue: Well-designed, or coming unstuck after initial experimentation? (9)
### Answer: ERGONOMIC 
 ### Explanation: Definition: Well-designed
 **Anagram of**(unstuck) OR COMING **placed below**(after, in a down clue) **the 1st letter of**(initial) "experimentation ".
Answer: Designed to minimise physical fatigue and discomfort, thus allowing maximum efficiency, eg. office furniture.