One used to hang out with actor, English, in block (7,3)
I believe the answer is:
clothes peg
'one used to hang out' is the definition.
I can't judge whether this defines the answer.
'actor english in block' is the wordplay.
'actor' becomes 'thesp' (short for thespian, term for an actor).
'english' becomes 'E' (abbreviation as in OED).
'in' means one lot of letters goes inside another.
'block' becomes 'clog' (clogging is a kind of blocking).
'thesp'+'e'='thespe'
'thespe' put within 'clog' is 'CLOTHES-PEG'.
'with' acts as a link.
Can you help me to learn more?
(Other definitions for clothes peg that I've seen before include "Device to clip laundry to line" , "Fastener for washing line" , "one stuck on the line?" , "on-line clip?" .)