Small craft with a carbon line in the centre (7)
I believe the answer is:
coracle
'small craft' is the definition.
'coracle' can be an answer for 'craft' (I've seen this before). I'm not certain of the 'small' bit.
'a carbon line in the centre' is the wordplay.
'carbon' becomes 'c' ('C' can be a synonym of 'carbon').
'line' becomes 'l'.
'in the' means one lot of letters goes inside another.
'centre' becomes 'core' (core is a kind of centre**).
'a'+'c'+'l'='acl'
'acl' placed inside 'core' is 'CORACLE'.
'with' is the link.
Can you help me to learn more?
(Other definitions for coracle that I've seen before include "craft" , "Small primitive boat" , "Traditional rounded boat with wicker frame" , "Small rowing boat of wicker and hide" , "Welsh wickerwork boat" .)