A clan involved in navigation (5)
I believe the answer is:
canal
'navigation' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'a clan involved' is the wordplay.
'involved' indicates anagramming the letters (involved can mean confusing or complex).
'a'+'clan'='aclan'
'aclan' anagrammed gives 'CANAL'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for canal that I've seen before include "Artificial waterway as at Panama (5)" , "Inland waterway" , "eg Grand Union" , "Man-made strip of water" , "Long, narrow strip of water" .)