Try to be inconspicuous (3,3)
I believe the answer is:
lie low
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">try to be inconspicuous</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 lie low that I've seen before include "Absent oneself from social contact (for a period)" , "Stay out of sight, be inconspicuous" , "Conceal oneself or one's intentions" , "Keep hidden" , "Conceal oneself, don't be conspicuous" .)