Expose and rile eccentric office worker with a long commute? (7)
I believe the answer is:
outlier
'office worker with a long commute?' is the definition.
(someone who lives far away from their workplace)
'expose and rile eccentric' is the wordplay.
'expose' becomes 'out' (to out someone is to expose them).
'and' says to put letters next to each other.
'eccentric' is an anagram indicator.
'rile' anagrammed gives 'lier'.
'out'+'lier'='OUTLIER'
(Other definitions for outlier that I've seen before include "Remote member of a group" , "Statistical anomaly" , "Anomalous data point" , "Isolated data point" , "Rock formation" .)