Wrongly decide about a time to devote (8)
I believe the answer is:
dedicate
'devote' is the definition.
(I know this)
'wrongly decide about a time' is the wordplay.
'wrongly' indicates anagramming the letters (I've seen this in other clues).
'about' is an insertion indicator.
'time' becomes 't' (abbreviation).
'decide' anagrammed gives 'dedice'.
'a'+'t'='at'
'dedice' placed around 'at' is 'DEDICATE'.
'to' is the link.
(Other definitions for dedicate that I've seen before include "Devote to a sacred person or use" , "Devote to a special purpose, say time or energy" , "Devote (to), pledge (to)" , "Address (eg, a book to a person)" , "Commit" .)