38d is pretty awful, don’t like head as intelligence or water as excellence.
Not a fan of wraith meaning shade either in 29a.
I guessed Watson’s colleague in 32d was Cric(k) - losing the k for
potassium, but still can’t parse the answer (not helped because I’ve never heard of the word ‘creatic’).
Still not sure that 55a needs the word ‘American’.
Couple more.
45a Most risky district French company’s invested in (7)
Diciest?
25d Class diversity in music-hall entertainment (7)
Variety. But what’s the word ‘class’ doing in the clue? It doesn’t seem needed.