Girl removed without pity (8)
I believe the answer is:
ruthless
'without pity' is the definition.
('pity' can be 'ruth' (as opposed to ruthlessness) so maybe 'without pity' can be ''ruthless')
'girl removed' is the wordplay.
I cannot quite understand how this works, but
'girl' could be 'ruth' (girl's name) and 'ruth' is found in the answer.
The remaining letters 'less' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for ruthless that I've seen before include "Without pity or compassion" , "Showing no compassion" , "nasty" , "Unmerciful" , "Callous" .)