Tricky part of course? Company head keeps eye in (3,3)

I believe the answer is:

dog leg

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'tricky part' is the definition.
'dog leg' can be an answer for 'part' (I have seen 'Part of course' mean 'dog leg' so perhaps 'part' could also mean 'dog leg'). I am unsure of the 'tricky' bit.

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for dog leg that I've seen before include "Part of course" , "one of several used by boxer" , "difficult bend" .)

I've seen this clue in The Times.

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