I'd seen the girl in distress (6)
I believe the answer is:
denise
'girl in distress' is the definition.
'Denise' can be an answer for 'girl' (Denise is a girl's name). I am unsure of the 'in distress' bit.
'i'd seen' is the wordplay.
'i'd seen' can be anagrammed to 'DENISE'.
However, I am not sure how the anagram is indicated.
'the' acts as a link.
Can you help me to learn more?
(Other definitions for denise that I've seen before include "- - Lewis, pentathlete" , "Miss Van Outen" .)