I would be grateful for any hints to help me finish off my cryptic.
Disappointing fight for charity (4, 3)
P??? ???  (possibly P?A? B??)
Examine in depth a cause of complaint (1-3)
??A?  (X-RAY? if so, why?)
A doctor's name (4)
A?O?
It's built as an ocean container (6)
?R?R?E
As always, my existing letters should be taken more as possibilities than facts.  Thank you in advance.