Surgeon worried about Charlie’s bum (8)
I believe the answer is:
scrounge
'bum' is the definition.
(I've seen this before)
'surgeon worried about charlie's' is the wordplay.
'worried' indicates an anagram (worry can mean to interfere with or disturb).
'about' is an insertion indicator.
'charlie' becomes 'C' (phonetic alphabet: alpha, bravo, charlie etc.).
'surgeon' with letters rearranged gives 'srounge'.
'srounge' enclosing 'c' is 'SCROUNGE'.
(Other definitions for scrounge that I've seen before include "Seek something free from others" , "Obtain by begging" , "Cadge, sponge" , "Freeload" , "Cadge, beg" .)