Could it be Just Stay There?
Harry is abused through neglect:
The Dursley's had taken up a new tactic to torture him this summer. And boy was it thrilling. It wasn’t physical or anything, simply neglect.
Snape is the one to notice and rescue him in the first chapter.
Crop tops are mentioned in chapter 5. Haven't found mention of strawberries yet, but there are 32 chapters to hunt through:
Then it struck him. They were crop tops. The tiny shirts looked innocent enough, all of them ranging in colors. None of them purple though. Harry didn’t know what to think. Did he really want to try on these strictly feminine garments?
The House Elf is called Odin.
Competitive strawberry picking in chapter 14:
To prove that he was now definitely focusing on the task, Draco began to speed up his movements. Quickly scuttling down the row, only picking a few berries from each bush before moving on. Potter noticed what he was doing and also hastened his task. Soon they were racing down the aisle. Their hands solely focused on the berries, and their eyes alternating between their opponent and the berries.
Found with search 'harry potter snape "crop top" site:archiveofourown.org'