Musical symbol lent force in new arrangement (5,4)
I believe the answer is:
tenor clef
'musical symbol' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'lent force in new arrangement' is the wordplay.
'in new arrangement' is an anagram indicator (I've seen this in other clues).
'lent'+'force'='lentforce'
'lentforce' is an anagram of 'TENOR-CLEF'.
Can you help me to learn more?
(Other definitions for tenor clef that I've seen before include "instruction for a musician" , "A stave marking for pitch" , "Character instructing musician" , "One on the staff" , "It has middle C on second- highest line" .)