Church hymn
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">church hymn</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 te deum that I've seen before include "Ancient liturgical hymn" , "music" , "Ancient Christian hymn" , "Christian hymn of thanksgiving" , "Canticle" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">church hymn</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>