Guy the man sees occasionally (5)
I believe the answer is:
tease
'guy' is the definition.
(I know this)
'man sees occasionally' is the wordplay.
'man' becomes 'tea' (I can't justify this - if you can you should give a lot more credence to this answer).
'occasionally' indicates alternate letters.
The alternate letters of 'sees' are 'se'.
'tea'+'se'='TEASE'
'the' acts as a link.
Can you help me to learn more?
(Other definitions for tease that I've seen before include "Gently rib" , "Ridicule" , "Comb or card (wool)" , "Torment lightly" , "Annoy good-naturedly" .)