Exaggerate silly point about garland (4,2,2)

I believe the answer is:

pile it on

'exaggerate' is the definition.
(thesaurus)

'silly point about garland' is the wordplay.
'silly' is an anagram indicator.
'about' means one lot of letters goes inside another.
'garland' becomes 'lei' (synonyms).
'point' with letters rearranged gives 'piton'.
'piton' placed around 'lei' is 'PILE IT ON'.

(Another definition for pile it on that I've seen is " Informally exaggerate - add to heap".)

I've seen this clue in The Telegraph.

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