Love loud tango - what about gospel's wrong? (3,3,4)
I believe the answer is:
off the mark
'wrong?' is the definition.
'love loud tango what about gospel's' is the wordplay.
'love loud' becomes 'off' (I can't justify this - if you can you should believe this answer much more).
'tango' becomes 'T' (phonetic alphabet: alpha, bravo, charlie etc.).
'what' becomes 'eh' (I've seen this in other clues).
'about' is a reversal indicator.
'gospel' becomes 'Mark' (Gospel of Mark).
'eh' in reverse letter order is 'he'.
'off'+'t'+'he'+'mark'='OFF THE MARK'
(Other definitions for off the mark that I've seen before include "under a misapprehension" , "Having started" , "that's not right" , "Inaccurate; getting first run" .)