A craft is large (7)

I believe the answer is:

algiers

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'a craft is large' is the definition.
I can't judge whether this defines the answer.

'craft is large' is the wordplay.
'craft' is an anagram indicator (letters must be crafted into a new form).
'is'+'large'='islarge'
'islarge' is an anagram of 'ALGIERS'.

Can you help me to learn more?

(Other definitions for algiers that I've seen before include "Capital city" , "NW African capital" , "North African port" , "N. African port" , "North African capital" .)

I've seen this clue in The Guardian.

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