Family of Cyril Allen gutted (4)
I believe the answer is:
clan
'family' is the definition.
(clan can mean a large family)
'cyril allen gutted' is the wordplay.
'cyril' becomes 'cl' (I can't explain this - if you can you should give a lot more credence to this answer).
'gutted' suggests removing the centre (to gut something is to remove its insides).
'allen' with its middle removed is 'an'.
'cl'+'an'='CLAN'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for clan that I've seen before include "Scottish family grouping" , "Large family forming close group, big in Scotland" , "Kinship group" , "Scots family group" , "People related by blood and marriage" .)