Brilliant flipping tackle by English fellow (9)
I believe the answer is:
effulgent
'brilliant' is the definition.
(I've seen this before)
'flipping tackle by english fellow' is the wordplay.
'flipping' says the letters should be written backwards.
'tackle by' becomes 'luff' (I can't justify this - if you can you should believe this answer much more).
'english' becomes 'E' (abbreviation).
'fellow' becomes 'gent' (synonyms).
'luff'+'e'='luffe'
'luffe' reversed gives 'efful'.
'efful'+'gent'='EFFULGENT'
Can you help me to learn more?
(Other definitions for effulgent that I've seen before include "brilliant" , "Radiant or bright in literary way" , "Shining brightly" .)