Register as unemployed (4,2)
I believe the answer is:
sign on
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">register as unemployed</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for sign on that I've seen before include "claim unemployment benefit as well" , "Register as for social welfare payments" , "'Register, for job-seeker's allowance, say (4,2)'" , "Register, say as being unemployed" , "Register oneself as for employment assistance" .)