Restricted journal and sound equipment to take from section of trunk? (9)

I believe the answer is:

microblog

'restricted journal' is the definition.
(journal requiring short entries)

'sound equipment to take from section of trunk?' is the wordplay.
'sound equipment' becomes 'mic' (short for microphone).
'to take from' becomes 'rob' (to rob someone is to take things from them).
'section of trunk?' becomes 'log' (part of a tree trunk).
'mic'+'rob'+'log'='MICROBLOG'

'and' acts as a link.

(Another definition for microblog that I've seen is " set of little posts".)

I've seen this clue in The Times.

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