Mass production of lager (5)

I believe the answer is:

large

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'mass production' is the definition.
Both the answer and definition are adjectives. Maybe there's a link between them I don't understand?

'of lager' is the wordplay.
'of' indicates anagramming the letters (the answer comes from or 'of' the letters).
'lager' is an anagram of 'LARGE'.

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(Other definitions for large that I've seen before include "Ample" , "Gross" , "Big, great" , "Bumper" , "Of considerable size or extent" .)

I've seen this clue in the Evening Standard.

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