Possible Clues:

• He is in there for a treat, just for show
• The rate is crooked, all for show
• The twisted end of 21 across is all for show
• Where the drama of warfare is played out
• There's a playful operation going on there
• At present, outside the area of action
• Sufficient heat remaining to show where 26 may be used
• eg The Globe
• Criterion for actors?
• At this stage the tree gets a hat