Online many pieces are poorly assembled and not really what they are being sold as (2,4,4)

I believe the answer is:

in name only

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

'poorly assembled and not really what they are being sold as' is the definition.
The definition suggests an adverb but the answer is an adverb.

'online many pieces' is the wordplay.
'pieces' is an anagram indicator (the same pieces in a new order).
'online'+'many'='onlinemany'
'onlinemany' anagrammed gives 'IN NAME ONLY'.

'are' is the link.

Can you help me to learn more?

I've seen this clue in The Irish Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.