There's a portrait of her in the hall, which I think must have been done long after her death.
Joan of Acre is a very interesting character not just because she is the only member of the royal family I can think of born in Asia (or outside Europe for that matter).
Eleanor de Clare married the younger Despenser (and had nine children with him!).
Yes, I'm quite a fan of Joan too! She spent most of her childhood in France, being brought up by her grandmother, Jeanne de Dammartin, Countess of Ponthieu. And of course she had the courage to defy her father and marry a man of her own choice.
Alianore/Eleanor de Clare was married to Despenser by Edward I, her grandfather, not Edward II, as many people seem to think (not you, bell!)

They were married for 20 years. In early 1329, she was abducted (and married) from Hanley Castle by William la Zouche, who was one of the men who'd arrested Despenser.