A capital orchestra, too! (4)

I believe the answer is:

also

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'too' is the definition.
(synonyms)

'a capital orchestra' is the wordplay.
'capital orchestra' becomes 'lso' (London Symphony Orchestra. I am not sure about the 'capital' bit.).
'a'+'lso'='ALSO'

Can you help me to learn more?

(Other definitions for also that I've seen before include "into the bargain" , "Item" , "Furthermore" , "revolutionary a part for Yugoslavia" , "Old" .)

I've seen this clue in the Evening Standard.

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