### Clue: About a nurse, overcome by real stress showing (9)
### Answer: ACCENTUAL 
 ### Explanation: Definition: stress showing
 [ C(abbrev. for "circa";about, when refering to particular time periods) + EN(abbrev. for "enrolled nurse" in the UK) ] **contained in**(overcome by) ACTUAL(real).
Defn: Descriptive of poetry based on the number of stresses in a line rather than on the number of syllables.