Expression on worker catching a good shrew (9)

I believe the answer is:

termagant

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'shrew' is the definition.
(I know that shrew can be written as termagant)

'expression on worker catching a good' is the wordplay.
'expression' becomes 'term' (I've seen this in another clue).
'on' means one lot of letters go next to another.
'worker catching' becomes 'ant' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'good' becomes 'g' (abbreviation).
'a'+'g'='ag'
'ant' put after 'ag' is 'agant'.
'term'+'agant'='TERMAGANT'

Can you help me to learn more?

(Other definitions for termagant that I've seen before include "Scolding bad-tempered woman" , "She might do it" , "Shrew, scold" , "brawling" , "Nagging woman" .)

I've seen this clue in The Times.

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