Girl I sob over (5)
I believe the answer is:
naomi
'girl' is the definition.
(girl's name)
'i sob over' is the wordplay.
'sob' becomes 'moan' (I can't explain this - if you can you should believe this answer much more).
'over' shows that the letters should be reversed in order.
'i'+'moan'='imoan'
'imoan' backwards is 'NAOMI'.
Can you help me to learn more?
(Other definitions for naomi that I've seen before include "Relative of Ruth" , "Biblical mother-in-law of Ruth" , "Do I moan about Biblical Ruth's mother-in-law?" , "OT female" , "woman in the Bible" .)