Phil's achievements in the field of instrumental and classical crossover have brought him a legion of fans and sustained critical ______________.            

The correct word here is ‘acclaim’. It means ‘public approval and praise’. Claim- to say that something is true or is a fact, although you cannot prove it and other people might not believe it. Proclaim- to announce something publicly or officially, especially something positive. Reclaim- to announce something publicly or officially, especially something positive. Phil's achievements in the field of instrumental and classical crossover have brought him a legion of fans and sustained critical acclaim .