Striking, oddly very English, and infectious (3-8)
I believe the answer is:
eye-catching
'striking' is the definition.
(I've seen this before)
'oddly very english and infectious' is the wordplay.
'oddly' means one should take alternating letters (letters in the odd-numbered positions are used).
'english' becomes 'E' (abbreviation).
'and' is a charade indicator (letters next to each other).
'infectious' becomes 'catching' (similar in meaning).
The alternate letters of 'very' are 'ey'.
'ey'+'e'+'catching'='EYE-CATCHING'
(Other definitions for eye-catching that I've seen before include "Seizing one's attention" , "Standing out" , "Attracting attention" , "Attractive" , "Conspicuous" .)