Dotty made love in Doha ending early phase of chastity (10)
I believe the answer is:
maidenhood
'phase of chastity' is the definition.
(being a young, unmarried woman)
'dotty made love in doha ending early' is the wordplay.
'dotty' indicates an anagram.
'love' becomes 'o' (love means zero in tennis).
'ending early' means to remove the last letter.
'made'+'o'+'in'+'doha'='madeoindoha'
'madeoindoha' with its final letter taken off is 'madeoindoh'.
'madeoindoh' anagrammed gives 'MAIDENHOOD'.
(Other definitions for maidenhood that I've seen before include "when female is young" , "Being a girl" .)