Fresh spider crab in dry biscuit (10)

I believe the answer is:

crispbread

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

'dry biscuit' is the definition.
The definition suggests a singular noun which matches the answer.

'fresh spider crab' is the wordplay.
'fresh' is an anagram indicator (a fresh re-ordering of the letters).
'spider'+'crab'='spidercrab'
'spidercrab' anagrammed gives 'CRISPBREAD'.

'in' acts as a link.

Can you help me to learn more?

I've seen this clue in The Telegraph.

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