Yankee stops fellows travelling up for meeting (5)
I believe the answer is:
synod
'meeting' is the definition.
(type of religious meeting)
'yankee stops fellows travelling up' is the wordplay.
'yankee' becomes 'Y' (phonetic alphabet: alpha, bravo, charlie etc.).
'stops' indicates putting letters inside.
'fellows' becomes 'dons'.
'travelling up' says the letters should be written backwards (in a down clue, letters go up).
'y' going into 'dons' is 'donys'.
'donys' written backwards gives 'SYNOD'.
'for' is the link.
(Other definitions for synod that I've seen before include "Ecclesiastical council" , "group of clergymen" , "cloth gathered here" , "Ecumenical council" , "Ecclesiastical assembly" .)