Not old enough for a state nurse (3)
I believe the answer is:
ten
'not old enough' is the definition.
The answer and definition can be both quantities as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'a state nurse' is the wordplay.
'TEN' is hidden within the letters.
However, I am unsure how the hidden word is indicated.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for ten that I've seen before include "How many" , "Five times two" , "Base of decimal system" , "X-WORD" , "Half a score" .)