Little wrinkles, removing head in butchery jobs (8,5)

I believe the answer is:

laughter lines

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'little wrinkles' is the definition.

'removing head in butchery jobs' is the wordplay.
'removing head in' means to remove the first letter.
'butchery' becomes 'slaughter' (synonyms).
'jobs' becomes 'lines' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'slaughter' with its first letter taken off is 'laughter'.
'laughter'+'lines'='LAUGHTER LINES'

Can you help me to learn more?

I've seen this clue in The Everyman puzzle in The Observer.

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