A French extravaganza is hardly remarkable (13)

I believe the answer is:

unspectacular

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'hardly remarkable' is the definition.
I can't tell whether this definition defines the answer.

'a french extravaganza' is the wordplay.
'a french' becomes 'un' ('a' in French).
'extravaganza' becomes 'spectacular' (I've seen this before).
'un'+'spectacular'='UNSPECTACULAR'

'is' is the link.

Can you help me to learn more?

(Other definitions for unspectacular that I've seen before include "Unremarkable" , "Ordinary" , "Not dramatic" .)

I've seen this clue in The Daily Express.

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