Comedian with repeated hesitation, one stumbling around? (8)
I believe the answer is:
dodderer
'one stumbling around?' is the definition.
'comedian with repeated hesitation' is the wordplay.
'comedian' becomes 'dodd' (Ken Dodd).
'with' says to put letters next to each other.
'repeated' says to double the letters.
'hesitation' becomes 'er'.
'er' doubled is 'erer'.
'dodd'+'erer'='DODDERER'
(Other definitions for dodderer that I've seen before include "one both decrepit and shaky" , "one unsteady on his feet" .)