Goal worked, having right tempo (5)
I believe the answer is:
largo
'tempo' is the definition.
(thesaurus)
'goal worked having right' is the wordplay.
'worked' indicates anagramming the letters.
'having' is an insertion indicator.
'right' becomes 'r' (abbreviation).
'goal' is an anagram of 'lago'.
'lago' going around 'r' is 'LARGO'.
(Other definitions for largo that I've seen before include "(Musically) slow in tempo and broad in manner" , "Broad and slow (mus.)" , "Slow passage" , "Slow piece of music" , "moving slowly" .)