Something for the head girl one caught (5)
I believe the answer is:
tiara
'something for' is the definition.
I can't judge whether this definition defines the answer.
'the head girl one caught' is the wordplay.
'head' indicates taking the first letters.
'girl' becomes 'ara' ().
'one' becomes 'i' (Roman numeral).
'caught' means one lot of letters goes inside another.
The first letter of 'the' is 't'.
't'+'ara'='tara'
'tara' placed around 'i' is 'TIARA'.
Can you help me to learn more?
(Other definitions for tiara that I've seen before include "Great delight" , "Jewelled headwear" , "Jewelled head ornament" , "Jewelled headband" , "Jewelled head band" .)