Girl with a shirt that is a shade of red (6)
I believe the answer is:
claret
'that is a shade of red' is the definition.
(I've seen this before)
'girl with a shirt' is the wordplay.
I cannot quite see how this works, but
'girl' could be 'clare' and 'clare' is found within the answer.
'shirt' could be 't' (as in a T-shirt) and 't' is found within the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for claret that I've seen before include "French wine" , "Deep purplish colour" , "Type of red wine" , "Red Bourdeaux wine" , "Deep purplish-red" .)