Quickly taking a quiet break when there's nothing on (6)
I believe the answer is:
presto
'quickly' is the definition.
(I've seen this in another clue)
'a quiet break when there's nothing on' is the wordplay.
'a quiet' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'break when' becomes 'rest' (a rest is taking a break. I am not sure about the 'when' bit.).
'there's nothing' becomes 'o' (I've seen this in other clues).
'on' says to put letters next to each other.
'p'+'rest'+'o'='PRESTO'
'taking' is the link.
Can you help me to learn more?
(Other definitions for presto that I've seen before include "Very fast (mus.)" , "quickly in bars" , "Hey ..., said the magician" , "Moving quickly" , "29 [ADAGIO]? On the contrary" .)