One looking small β ceramics worker? (7)
I believe the answer is:
spotter
'one looking' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'small ceramics worker?' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'ceramics worker?' becomes 'potter' (I've seen this before).
's'+'potter'='SPOTTER'
Can you help me to learn more?
(Other definitions for spotter that I've seen before include "One who looks to train" , "Observer" , "Train enthusiast" , "artist such as Seurat?" , "scout?" .)