Producer of Robin's apparel, Ian tailored pockets (7)

I believe the answer is:

reliant

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'producer of robin's apparel ian tailored pockets' is the definition.
I can't judge whether this defines the answer.

'apparel ian tailored pockets' is the wordplay.
'pockets' indicates a hidden word (pocket can mean to contain).
'RELIANT' is hidden within 'apparel ian tailored'.

Can you help me to learn more?

(Other definitions for reliant that I've seen before include "Depending on another for support" , "Inspiring confidence" , "Dependent upon" , "car firm" , "Dependent (on person)" .)

I've seen this clue in The Telegraph.

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