Catch Gibson following streetcar? (7)
I believe the answer is:
trammel
'catch' is the definition.
(trameling is a kind of catching)
'gibson following streetcar?' is the wordplay.
'gibson' becomes 'mel' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'following' means one lot of letters go next to another.
'streetcar?' becomes 'tram' (synonyms).
'mel' after 'tram' is 'TRAMMEL'.
Can you help me to learn more?
(Other definitions for trammel that I've seen before include "Place limits on" , "bar" , "Hobble" , "Fetter" , "Hindrance" .)