The designer of head gear for the mine worker. I will enter (8)
I believe the answer is:
milliner
'the designer of head gear for the mine' is the definition.
I can't tell whether this defines the answer.
'worker i will enter' is the wordplay.
'worker' becomes 'miner' (miner is a kind of worker).
'i will' becomes 'I'll' (abbreviation).
'enter' indicates putting letters inside.
'miner' going around 'ill' is 'MILLINER'.
Can you help me to learn more?
(Other definitions for milliner that I've seen before include "Maker and seller of hats" , "Hat-maker" , "Garment maker" , "Maker of women's hats" , "trader" .)