Spenser left salesperson confused too (4)

I believe the answer is:

also

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

'too' is the definition.
(synonyms)

'spenser left salesperson' is the wordplay.
'left' is a deletion indicator.
'salesperson' with 'spenser' removed is 'ALSO'.

'confused' is the link.
I am not very happy about this link. It may belong to another bit of the clue.

Can you help me to learn more?

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

I've seen this clue in The Hindu.

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