Possible Clues:

• Type of idyllic landscape having dark brown evergreen tree
• Ever so pretty externally, its contents may be plain
• (Of a picture) pretty in a conventional way
• Leading figure in row about lake being sited in wild beach -- too twee
• Be cool and chat about old times as sentimentally appealing
• Second grade engine reversing round cross after church is having sentimental appeal
• Tritely pretty
• Appealingly twee (picture)