In perfect condition (5,2,1,4)
I believe the answer is:
sound as a bell
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">in perfect condition</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 sound as a bell that I've seen before include "In perfect condition - laudable sons (anag)" , "In perfect health" , "Ring" .)