Range of skills of reporter I trained on 'Echo' (10)
I believe the answer is:
repertoire
'range of skills' is the definition.
(I've seen this before)
'reporter i trained on echo' is the wordplay.
'trained' indicates an anagram (to train can mean to grow something into a shape).
'on' is an insertion indicator (as in clothing \'on\' a person).
'echo' becomes 'e' (phonetic alphabet: alpha, bravo, charlie etc.).
'reporter'+'i'='reporteri'
'reporteri' is an anagram of 'reprtoire'.
'reprtoire' placed around 'e' is 'REPERTOIRE'.
'of' acts as a link.
(Other definitions for repertoire that I've seen before include "Pieces a performer knows and plays" , "Complete range of a performer's prepared material" , "Range of works performed" , "Range of skills or songs" , "This is all actor can portray" .)