Queen is pressing clergyman about missile carriers (7)
I believe the answer is:
quivers
'missile carriers' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Maybe there's an association between them I don't understand?
'queen is pressing clergyman' is the wordplay.
'queen' becomes 'qu' (abbreviation for queen).
'pressing' indicates putting letters inside.
'clergyman' becomes 'ver' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'is' placed around 'ver' is 'ivers'.
'qu'+'ivers'='QUIVERS'
'about' is the link.
Can you help me to learn more?
(Other definitions for quivers that I've seen before include "Trembles" , "Cases for holding arrows" .)