Again measures length of house, returning after getting retired (7)

'again measures' is the definition.
('times' is an answer for 'measures' so perhaps 'retimes' is OK for 'again measures')

'house returning after getting retired' is the wordplay.
'house' becomes 'semi' (short for semi-detached).
'returning' says the letters should be written in reverse.
'after getting' is a charade indicator (letters next to each other).
'retired' becomes 'ret' (e.g. following the name of a retired army officer).
'semi' backwards is 'imes'.
'imes' put after 'ret' is 'RETIMES'.

'length of' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?