Question Author
Sorry for not giving full info, my brain was a little scrambled.
7d) The study of language and its historical development (7)
p.i.o.o.y I have assumed last part is .....olgy
In meantime I have had confirmation from lady-janine that I had misspelt
7d) answer is PHILOLOGY and 14A Is correct as Chemical with atomic number 46 ie PALLADIUM
Many thanks for your interest and help.