On a stroll in the gardens of Kew [Chalky] Well, I know now, I didn't see the middle two words.
My first letter looks like a tent
My second's a coin oft spent
Then ditto for three
The fourth's a trainee
And my last is the vowel in Lent
What a pleasure it is to be given such challenging rhyming opportunities. And to get two such challenges in the one limerick! Appropos of everything - this may be of some interest to enthusiastic limerickators :-)