Say the chaps have got into trouble (7)
I believe the answer is:
mention
'say' is the definition.
(mentioning is a kind of saying)
'chaps have got into trouble' is the wordplay.
'chaps have' becomes 'men' (I can't justify this - if you can you should give a lot more credence to this answer).
'got' means one lot of letters goes inside another.
'trouble' indicates an anagram.
'into' with letters rearranged gives 'ntio'.
'men' placed around 'ntio' is 'MENTION'.
'the' acts as a link.
Can you help me to learn more?
(Other definitions for mention that I've seen before include "Allude to" , "Cite; quote" , "Make reference to" , "Briefly refer to (something)" , "Acknowledge" .)