Criminal firm, old, controlled by pig — it might put the squeeze on you? (3,11)
I believe the answer is:
boa constrictor
'criminal firm old controlled by pig it might' is the definition.
I can't tell whether this defines the answer.
'the squeeze on you?' is the wordplay.
'the squeeze' becomes 'constrict' (I've seen this before).
'on' means one lot of letters goes inside another.
'you?' becomes 'boaor' (I can't explain this - if you can you should believe this answer much more).
'constrict' placed within 'boaor' is 'BOA-CONSTRICTOR'.
'put' acts as a link.
Can you help me to learn more?
(Other definitions for boa constrictor that I've seen before include "Medium-sweet sherry" , "Large snake" .)