Rob Lowe gutted after fare goes up (6)
I believe the answer is:
burgle
'rob' is the definition.
(I've seen this in another clue)
'lowe gutted after fare goes up' is the wordplay.
'gutted' says to hollow out the word (remove centre letters) (to gut something is to remove its insides).
'after' says to put letters next to each other.
'fare' becomes 'grub' (grub can informally mean food).
'goes up' says the letters should be written backwards.
'lowe' with its middle taken out is 'le'.
'grub' backwards is 'burg'.
'le' put after 'burg' is 'BURGLE'.
(Other definitions for burgle that I've seen before include "Break in to 17 dn" , "Steal (from a house etc)" , "do so is illegal!" , "Break in and steal" , "Enter building to steal" .)