Fashionable present, for example — very strong (7)
I believe the answer is:
intense
'very strong' is the definition.
(I've seen this in another clue)
'fashionable present' is the wordplay.
'fashionable' becomes 'in' (in can mean fashionable or trendy).
'present' becomes 'tense' (present tense).
'in'+'tense'='INTENSE'
'for example' acts as a link.
(Other definitions for intense that I've seen before include "Fervent" , "Set nine (anag.)" , "Vivid, concentrated" , "Fierce - deep" , "Teen sin (anag.)" .)