The right I had to be disburdened (3)
I believe the answer is:
rid
'disburdened' is the definition.
The answer and definition are different parts of speech. However, past participle verbs and adjectives occasionally define each other.
'the right i had' is the wordplay.
'the right' becomes 'r' (common abbreviation).
'i had' becomes 'i'd' (contraction).
'r'+'id'='RID'
'to be' is the link.
Can you help me to learn more?
(Other definitions for rid that I've seen before include "Clear, remove" , "Disabuse" , "Free, disencumber" , "Throw off, unburden" , "Free, deliver, clear" .)