Possible Clues:

• Make slight improvements to (a photo/picture)
• First two characters in 6 down contact Pat for a little light repair in the gallery
• Alter, as a photograph
• Restore, correct or improve a painting
• Make slight improvements, as about to take show on the road shortly to Switzerland
• Improve gag about old uniform
• Make later improvements to crumbling outer surfaces of church
• Improve drench that's painful
• Edit with Photoshop, perhaps
• Fix the colors on, say