Possible Clues:

• Initial treatment given to injured person before arrival of doctor
• Preliminary medical help pending arrival of doctor
• Remedial treatment, if dirt's a problem
• Emergency medical treatment
• Perhaps 18 down would give you a tree that's uninteresting
• Is the attention they'd get from 13 across enough to make the gentlemen of Ireland unenterprising?
• Treatment given to injured person before doctor arrives
• If you're in a bloody state, you need the start of 1 across and get calm
• On Christmas tree, put conventional dressing
• The conifer, not being unsteady, can be a bit of a bind