The preview is long and for me somewhat ambiguous.
Here it is:
Six of the thematic clues are
really pairs of clues containing
wordplay only. Each pair
includes one of each of two
groups. Entries, also real
words or phrases, are formed
by transferring a single letter
from one answer to the other
according to a principle given by
similar amendments in a number
of the normally listed clues. One
‘thematic’ clue is a red herring,
a normal clue leading to a word
which will enable solvers to
verify that their amendments are
correct.
Help with :
10a. A turban, rolled, will do for
space in circuit (6)
24a. Unknown fibres in fashion, not
worth taking seriously (7)
2d. Drinks bringing old graduate
into towns (6)
Thanks.