Seldom encountered (4)
I believe the answer is:
rare
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">seldom encountered</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for rare that I've seen before include "Singular, infrequent" , "Very lightly cooked, meat say" , "Unusual(ly fine)" , "Very scarce, hardly cooked" , "Very scarce like valuable antique" .)