Dodgy dealer taking in West End given a warning (7)
I believe the answer is:
alerted
'given a warning' is the definition.
(I've seen this in another clue)
'dodgy dealer taking in west end' is the wordplay.
'dodgy' indicates anagramming the letters (a dodgy or wrong order of the letters).
'taking in' is an insertion indicator.
'end' indicates one should take the final letters.
The last letter of 'west' is 't'.
'dealer' anagrammed gives 'alered'.
'alered' going around 't' is 'ALERTED'.
(Other definitions for alerted that I've seen before include "Warned or aroused to a sense of danger" , "Warned, made aware" , "Put on guard, forewarned" , "Altered, having been put on guard" , "Given warning" .)