noun
autumn at harvest time; harvest autumn
Refers to the autumn season when crops are ready for harvest, often evoking a sense of abundance and the culmination of the farming year.
今年の出来秋は豊作で、農家は忙しい。
This year's harvest autumn is bountiful, and the farmers are busy.
出来秋の田んぼは黄金色に輝いている。
The rice fields in harvest autumn shine golden.
秋 is the general term for 'autumn', while 出来秋 narrows the focus to the harvest aspect of the season.
Compound of 出来 (deki, 'result, produce') and 秋 (aki, 'autumn'), literally 'produce autumn'.