You may find this on your shoulders, end of beard and collar (8)

I believe the answer is:

dandruff

'you may find this on your shoulders' is the definition.

'end of beard and collar' is the wordplay.
'end of' indicates one should take the final letters.
'collar' becomes 'ruff' (ruff is a kind of collar).
The final letter of 'beard' is 'd'.
'd'+'and'+'ruff'='DANDRUFF'

(Other definitions for dandruff that I've seen before include "Flaky complaint" , "Dried skin in hair" , "Unsightly flakes falling from scalp" , "Condition of the scalp" , "shedding scales" .)

I've seen this clue in The Telegraph.

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