This feels like a weak copy of what came before. 'Clarence' likely resembles what you’d expect from a follow-up or related story to 1946’s 'It's a Wonderful Life'. The original’s appeal is entirely missing, and despite possessing some sentimentality, it doesn’t leave much of an impression. Robert Carradine delivers an acceptable performance as Clarence, nothing special. Kate Trotter fares the best among the sup…