Pastoral fellow's worker emptied trench cooker (9)

I believe the answer is:

beethoven

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'pastoral fellow's worker emptied trench cooker' is the definition.
I can't tell whether this definition defines the answer.

'worker emptied trench cooker' is the wordplay.
'worker' becomes 'bee' (a worker bee).
'emptied' means to remove the middle letters.
'cooker' becomes 'oven' (synonyms).
'trench' with its centre taken out is 'th'.
'bee'+'th'+'oven'='BEETHOVEN'

Can you help me to learn more?

(Other definitions for beethoven that I've seen before include "I composed" , "source of bars?" , "Ludwig van .. . . . . . . ., great German composer" , "Composer of Fidelio, d. 1827" , "Composer, lived 1770-1827" .)

I've seen this clue in The Independent.

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