Pickled stuff for miser (8)

I believe the answer is:

tightwad

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'for miser' is the definition.
(synonyms)

'pickled stuff' is the wordplay.
'pickled' becomes 'tight' (I can't explain this - if you can you should believe this answer much more).
'stuff' becomes 'wad' (wadding is a kind of stuffing).
'tight'+'wad'='TIGHTWAD'

Can you help me to learn more?

(Other definitions for tightwad that I've seen before include "Cheapskate" , "Miserly person" , "Skinflint" , "Miser (sl.)" , "Mean person (US)" .)

I've seen this clue in The Sun.

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