The most common and most likely answer to this crossword clue is the 7 letter word ANGLIAN
A
N
G
L
I
A
N
More clues leading to the result ANGLIAN
- Church member mislays clubs belonging to ancient invaders?
- Early dialect I don’t understand, including odd elements of Gallic
- Like some old people here, having reduced fishing around area
- Old Ford model with name of German heritage
- Old English dialect spoken by Anglican, not Catholic
- Church of England fires Catholic of German descent
- Member of tribe has point of view not English — Scotsman?
- In a church losing a hundred of the old people
Buddy explains!

The straight part
We know that "Early dialect" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case early dialect = anglian.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.