Actor Sean (4)

I believe the answer is:
penn
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">actor sean</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for penn that I've seen before include "Colonising Quaker" , "Early Quaker leader" , "Milk actor" , "US state (abbrev.)" , "William ---, Quaker colonist" .)