Poor Gerald looked angry (6)
I believe the answer is:
'looked angry' is the definition.
I can't tell whether this definition defines the answer.
'poor gerald' is the wordplay.
'poor' is an anagram indicator.
'gerald' is an anagram of 'GLARED'.
Can you help me to learn more?
(Other definitions for glared that I've seen before include "Lowered", "Glowered", "Stared fiercely", "Was too bright", "Looked angrily".)