Key role is performing wonders (7)

I believe the answer is:

glories

I'm a little stuck... Click here to teach me more about this clue!

'wonders' is the definition.
The answer and definition can be both to do with communicating as well as being verbs in their -s form.
Perhaps they are linked in a way I don't understand?

'key role is performing' is the wordplay.
'key' becomes 'g' (musical key).
'performing' indicates anagramming the letters.
'role'+'is'='roleis'
'roleis' is an anagram of 'lories'.
'g'+'lories'='GLORIES'

Can you help me to learn more?

I've seen this clue in The Daily Express.

Want a hint initially instead of a full solution? Install my app