Snape is gutted Harry strained regarding uphill task (9)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

Anagram [strained] of SNAPE IS  H{arr}Y [gutted]. I dredged this up from memory eventually having met it in previous puzzles but unfortunately I couldn’t remember the spelling and made the wrong 50/50 choice over the placing of Y and I. Another unfair anagram clue to an unfamiliar word.