Tiny male spider, say, causing hiatus at concert (5,4)

I believe the answer is:

minim rest

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'causing hiatus at concert' is the definition.
I can't tell whether this definition defines the answer.

'tiny male spider' is the wordplay.
'tiny' becomes 'mini'.
'male' becomes 'm' (common abbreviation).
'spider' becomes 'rest' (I can't explain this - if you can you should give a lot more credence to this answer).
'mini'+'m'+'rest'='MINIM REST'

'say' is the link.

Can you help me to learn more?

(Another definition for minim rest that I've seen is " interval in a bar".)

I've seen this clue in The Independent.

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