Small fish found in channel (4)
I believe the answer is:
side
'in channel' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?
'small fish' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'fish' becomes 'ide' (type of fish).
's'+'ide'='SIDE'
'found' is the link.
Can you help me to learn more?
(Other definitions for side that I've seen before include "Accompanying" , "Spin given to a ball by striking it off-centre" , "Minor" , "Face - team" , "Team; facet" .)