Glove making hit but missing the head (6)
I believe the answer is:
'glove' is the definition.
(I know that mitten is a type of glove)
'hit but missing the head' is the wordplay.
'hit' becomes 'smitten' (past tense of 'smite').
'but missing the head' means to remove the first letter.
'smitten' with its initial letter taken away is 'MITTEN'.
'making' is the link.
(Other definitions for mitten that I've seen before include "Simple glove" , "Garment" , "Glove with no partition between fingers" , "boxing glove" , "Type of glove" .)