Fool across the pond first to decry little book (5)
I believe the answer is:
dweeb
'fool' is the definition.
(I've seen this before)
'first to decry little book' is the wordplay.
'first to' says to take the initial letters.
'little' becomes 'wee' (similar in meaning).
'book' becomes 'b' (abbreviation for book).
The initial letter of 'decry' is 'd'.
'd'+'wee'+'b'='DWEEB'
'across the pond' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for dweeb that I've seen before include "anorak" , "Geek" , "Nerd - wimp" , "(US) idiot" , "silly American" .)