"How's your father?" is in noisy exchanges with "All right!" (5)
I believe the answer is:
nooky
'how's your father?' is the definition.
(both are informal terms for sex)
'noisy exchanges with all right' is the wordplay.
'noisy exchanges' becomes 'noy' (I can't justify this - if you can you should believe this answer much more).
'with' indicates putting letters inside.
'all right' becomes 'ok' (synonyms).
'noy' going around 'ok' is 'NOOKY'.
'is in' is the link.
Can you help me to learn more?
(Other definitions for nooky that I've seen before include "Congress" , "Sexual activity (slang)" .)