Possible Clues:

• Leader's an idiot - real stupid!
• Leader set up den before start of open season
• Turn of the tide round the turn of the den for the leader of the Irish Times
• Drift round college, to hear considered view on paper
• The turn of the tide has nothing to the turn of the den of the leader
• Article in newspaper
• Leader back for the lair round the ebb and flow
• Oriel and adit rebuilt in column
• A leader of the press
• The tide begins to turn for 30 across