Chivalrous lad in pain (7)

I believe the answer is:

paladin

I'm a little stuck... Click here to teach me more about this clue!

'chivalrous lad in pain' is the definition.
I can't tell whether this definition defines the answer.

'lad in pain' is the wordplay.
'in' is an insertion indicator.
'lad' placed into 'pain' is 'PALADIN'.

Can you help me to learn more?

(Other definitions for paladin that I've seen before include "Medieval champion" , "Knightly champion" , "Knight errant; a peer of Charlemagne" , "paragon" , "Chivalrous knight" .)

I've seen this clue in the Evening Standard.

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