Listen carefully to sounds of brooks around middle of glen (2,3,4)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

BEARS (brooks) around VALLEY (glen) without the first and last letters (middle of) This one might have taken me ten minutes to parse! The ‘middle of glen’ = LE red herring is truly devious. But if we’re being fair, ‘Listen carefully to sounds’ is not exactly a Ximenean definition.