Crossword Genius

Small advance by one member in workplace (4)

Ross

I believe the answer is:

shop

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

'workplace' is the definition.
(I know that shop is a type of workplace)

'small advance by one member' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'advance by one member' becomes 'hop' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
's'+'hop'='SHOP'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for shop that I've seen before include "Place to buy" , "Retail outlet" , "Betray - place selling things" , "Be disloyal to" , "sales outlet" .)

I've seen this clue in The Telegraph.
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