A miner's mixed class (7)

I believe the answer is:

seminar

'class' is the definition.
(I know that seminar is a type of class)

'a miner's mixed' is the wordplay.
'mixed' is an anagram indicator.
'a'+'miners'='aminers'
'aminers' with letters rearranged gives 'SEMINAR'.

(Other definitions for seminar that I've seen before include "Tutorial group meeting" , "Meeting for study" , "Working meeting in College" , "University discussion" , "Symposium" .)

I've seen this clue in The Irish Independent.

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