Crossword Genius

Style having fewer frills could be rubbish (10)

Ross

I believe the answer is:

balderdash

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

'be rubbish' is the definition.
(I've seen this before)

'style having fewer frills' is the wordplay.
I cannot quite see how this works, but
'style' could be 'dash' (synonyms) and 'dash' is present in the answer.
The remaining letters 'balder' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

'could' is the link.

Can you help me to learn more?

(Other definitions for balderdash that I've seen before include "Piffle" , "Senseless talk" , "Twaddle" , "Rubbish" , "tripe" .)

I've seen this clue in The Independent.
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