Swedish pop group (4)
I believe the answer is:
abba
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">swedish pop group</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 abba that I've seen before include "rhyme scheme" , "Group winning the 1974 Eurovision Song Contest in Brighton" , "Eurovision prizewinning Swedish pop group" , "rhymes in Petrarchan sonnet" , "Swedish pop music group" .)