Smartphone I fixed for one who distrusts mankind (11)
I believe the answer is:
misanthrope
'one who distrusts mankind' is the definition.
'smartphone i fixed' is the wordplay.
'fixed' indicates anagramming the letters.
'smartphone'+'i'='smartphonei'
'smartphonei' anagrammed gives 'MISANTHROPE'.
'for' acts as a link.
(Other definitions for misanthrope that I've seen before include "He hates everyone" , "Moliere character" , "One with no love for fellow humans" , "Hater of humankind" , "Definitely not a "people" person! - shipmate Ron (anag)" .)