A girl got up about one (5)
I believe the answer is:
rosie
'a girl' is the definition.
(girl's name)
'got up about one' is the wordplay.
'got up' becomes 'rose' (past tense of 'raise').
'about' indicates putting letters inside.
'one' becomes 'i' (Roman numeral).
'rose' placed around 'i' is 'ROSIE'.
(Other definitions for rosie that I've seen before include "Cider girl" , "Cider with --, novel" , "-- Lee is slang for tea" , "riveting woman in 40s?" , "lady" .)