The most common and most likely answer to this crossword clue is the 7 letter word BLARNEY
I've seen this crossword clue in The Guardian
B
L
A
R
N
E
Y
More clues leading to the result BLARNEY
- Flatter by including NI port?
- Flattering talk in past about Latin composer
- Left thrown in fight — Paddy’s harmless nonsense
- Flannel from ex-PM, one gone with craving to be ascendant
- Little Bernard has line in flattery
- Persuasive talk from Liberal in argument
- Row about line in Irishman’s flattering speech
- Persuasive talk from learner in noisy argument
- Flattering words from lovelorn boy touring Antrim town
Buddy explains!

The straight part
We know that "Paddy’s harmless nonsense" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case paddy’s harmless nonsense = blarney.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does BLARNEY mean?
BLARNEY noun- Mindless chatter.
- Ability to talk constantly and fluently.
- Persuasive flattery or kind speech; smooth, wheedling talk.
- To beguile with flattery.