Drama by feeble girl at first — it’s not to be taken seriously! (9)
I believe the answer is:
plaything
'first it's not to be taken seriously' is the definition.
I can't tell whether this defines the answer.
'drama by feeble girl' is the wordplay.
'drama' becomes 'play' (synonyms).
'by' is a charade indicator (letters next to each other).
'feeble' becomes 'thin'.
'girl' becomes 'g'.
'play'+'thin'+'g'='PLAYTHING'
'at' acts as a link.
Can you help me to learn more?
(Other definitions for plaything that I've seen before include "Toy" , "used to impact king's conscience?" , "someone treated lightly" , "source of amusement" .)