Some problem anticipated by one of the fellows (3)
I believe the answer is:
man
'one of the fellows' is the definition.
'man' can be an answer for 'one' (thesaurus). I am not certain of the 'of the fellows' bit.
'some problem anticipated by' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'MAN' is hidden in the letters of 'problem anticipated by'.
Can you help me to learn more?
(Other definitions for man that I've seen before include "Attendant" , "Isle of ..., ... o'war" , "Male person" , "Adult human male" , "race" .)