Well built redhead interrupting research (6)
I believe the answer is:
sturdy
'well built' is the definition.
The answer and definition are not the same part of speech. However, past participle verbs and adjectives can sometimes define each other.
'redhead interrupting research' is the wordplay.
'redhead' becomes 'r' (head letter of 'red').
'interrupting' is an insertion indicator.
'research' becomes 'study'.
'r' inserted into 'study' is 'STURDY'.
Can you help me to learn more?
(Other definitions for sturdy that I've seen before include "Stalwart, stout, tough" , "Strongly and solidly built" , "Strong and solidly built" , "Strong, solid" , "Well-built - strapping" .)