Have fainting fits and intersperse (4,5)
I believe the answer is:
take turns
'intersperse' is the definition.
The answer and definition can be both related to change as well as being verbs in their base form.
Maybe they are linked in a way I don't understand?
'have fainting fits' is the wordplay.
'have' becomes 'take' (synonyms).
'fainting fits' becomes 'turns' (I am not sure about this - if you are sure you should believe this answer much more).
'take'+'turns'='TAKE TURNS'
'and' is the link.
Can you help me to learn more?
(Other definitions for take turns that I've seen before include "share the driving, say" , "in sequence" , "Work on an alternating basis" , "Participate in rotation" , "Alternate" .)