Starts accusing a crime body; limply ends with bitterness (6)
I believe the answer is:
acidly
'with bitterness' is the definition.
(I've seen this in another clue)
'starts accusing a crime body limply ends' is the wordplay.
'starts' suggests taking the first letters.
'a crime body' becomes 'cid' (I can't justify this - if you can you should give a lot more credence to this answer).
'ends' suggests removing the centre.
'limply' with its middle taken out is 'ly'.
The initial letter of 'accusing' is 'a'.
'a'+'cid'+'ly'='ACIDLY'
Can you help me to learn more?
(Other definitions for acidly that I've seen before include "Bitterly" , "in caustic manner" , "in a sour manner" .)