Honest fellow involved with Elizabeth (3)
I believe the answer is:
abe
'honest fellow' is the definition.
(I've seen this in another clue)
'involved with elizabeth' is the wordplay.
'involved with' indicates the answer is hidden within the clue.
'ABE' is hidden in the letters of 'elizabeth'.
(Other definitions for abe that I've seen before include "President Lincoln was known as Honest ..." , "Eg, president Lincoln" , "Lincoln's diminutive" , "Lincoln, familiarly" .)