Frank has managed (3)
I believe the answer is:
ran
'managed' is the definition.
(I've seen this before)
'frank has' is the wordplay.
'has' indicates the answer is hidden within the clue.
'RAN' can be found hidden inside 'frank'.
(Other definitions for ran that I've seen before include "Operated; hurried" , "Was candidate" , "Directed - fled" , "Tore" , "Organised" .)