This ironic broadcast is overly dramatic (10)

I believe the answer is:

histrionic

I'm a little stuck... Click here to teach me more about this clue!

'overly dramatic' is the definition.
'histrionic' can be an answer for 'dramatic' (I've seen this before). I'm unsure of the 'overly' bit.

'this ironic broadcast' is the wordplay.
'broadcast' is an anagram indicator.
'this'+'ironic'='thisironic'
'thisironic' is an anagram of 'HISTRIONIC'.

'is' is the link.

Can you help me to learn more?

(Other definitions for histrionic that I've seen before include "Melodramatic" , "Overly theatrical" , "Of acting; dramatic" .)

I've seen this clue in The Independent.

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