Prosaic middle of June play gets nearly all the credit (10)

'prosaic' is the definition.
Both the answer and definition are adjectives. Perhaps they are linked in a way I don't understand?

'middle of june play gets nearly all the credit' is the wordplay.
'middle of' means to look at the middle letters.
'play' becomes 'drama' (synonyms).
'gets' says to put letters next to each other.
'nearly all' means to remove the last letter (most but not all of the word).
'the credit' becomes 'tick' (on tick can mean purchased on credit).
The middle of 'june' is 'un'.
'tick' with its final letter taken off is 'tic'.
'un'+'drama'+'tic'='UNDRAMATIC'

Can you help me to learn more?