Striped creature over here eating kelp and plankton primarily (5)

I believe the answer is:

okapi

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'striped creature' is the definition.
'okapi' can be an answer for 'creature' (African mammal). I am not sure about the 'striped' bit.

'here eating kelp and plankton primarily' is the wordplay.
'here' becomes 'oi' (I can't justify this - if you can you should give a lot more credence to this answer).
'eating' is an insertion indicator.
'primarily' suggests taking the first letters.
The initial letters of 'kelp and plankton' is 'kap'.
'oi' enclosing 'kap' is 'OKAPI'.

'over' is the link.

Can you help me to learn more?

(Other definitions for okapi that I've seen before include "African ruminant" , "African mammal related to giraffe" , "Giraffe-related mammal" , "Ruminant related to the giraffe" , "Central African resident" .)

I've seen this clue in The Independent.

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