### Clue: Top of Bowfell, on ascending after morning light (5)
### Answer: AMBER 
 ### Explanation: Definition: light

[*top of*] **B**(owfell) + **<=RE** ("on", *ascending*) *after* **A.M.** (ante meridiem , so "morning")
 
*The "light" is the middle light in a set of traffic lights.