Taking gamble, Hazel and I developed new line in London (9)
I believe the answer is:
elizabeth
'new line in london' is the definition.
I can't tell whether this definition defines the answer.
'taking gamble hazel and i developed' is the wordplay.
'taking' indicates putting letters inside.
'gamble' becomes 'bet' (betting is a kind of gambling).
'and' says to put letters next to each other.
'developed' indicates anagramming the letters.
'hazel'+'i'='hazeli'
'hazeli' anagrammed gives 'elizah'.
'bet' placed within 'elizah' is 'ELIZABETH'.
Can you help me to learn more?
(Other definitions for elizabeth that I've seen before include "Tudor" , "Novelist Mrs Gaskell's first name" , "Queen in 1558-1603" , "Girl's name" , "Eight times married British-American actress, d. 2011" .)