Crossword Genius

Child's toy muffling bird song (3,2,2)

Ross

I believe the answer is:

let it go

'song' is the definition.

'child's toy muffling bird' is the wordplay.
'child's toy' becomes 'lego'.
'muffling' is an insertion indicator.
'bird' becomes 'tit' (tit is a kind of bird).
'lego' enclosing 'tit' is 'LET IT GO'.

(Other definitions for let it go that I've seen before include "Disney tune" , "Hit song from Disney's 2013 animated feature film Frozen" , "Excuse something" , "Refrain from comment" .)

I've seen this clue in The Telegraph.
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