Copies produced by Band Aid and lots of players (7,5)

I believe the answer is:

plaster casts

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'lots of players' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Maybe they are linked in a way I don't understand?

'copies produced by band aid' is the wordplay.
'copies' becomes 'casts' (cast is a kind of copy).
'produced by' means one lot of letters go next to another.
'band aid' becomes 'plaster' (I can't justify this - if you can you should believe this answer much more).
'casts' after 'plaster' is 'PLASTER CASTS'.

'and' is the link.

Can you help me to learn more?

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

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