Compatible. You can take it together. By the way, I remind you that an instruction is usually attached to drugs, and the drug interaction point is part of it. If in doubt, read this manual. You can also find descriptions of drugs on the network, for example, on rlsnet.ru
Oral contraceptives work by blocking ovulation by inhibiting the production of FSH and LH in the pituitary gland. Clenbuterol is a beta-2 agonist, i.e. attaches to beta-2 receptors in muscle and adipose tissue, then causing a number of biochemical reactions leading to the formation of cyclic adenosine monophosphate (aka cAMP), which, in turn, activates enzymes that mobilize fatty acids from adipocytes (adipose tissue cells). Also, with the action of clenbuterol on the beta-2-adrenergic receptors of the presynaptic membrane, the release of norepinephrine and adrenaline increases. The secretion of thyroid hormones is enhanced, which leads to an increase in the metabolic rate by about a third. So, no, there will be no interaction between them, the action of clenbuterol will not be blocked by contraceptives.
Small addition: I don't want to read morality, because taking any drug is your personal choice, but nevertheless, I would not recommend taking clenbuterol without a doctor's prescription, since it has a number of unpleasant side effects. If you nevertheless decide, then it is worth taking it together with ketotifen (increases the sensitivity of beta-2 adenoreceptors, which allows you to increase the length of the course, and, accordingly, to get the best effect) and bisoprolol (blocks beta-1 adenoreceptors, tremors and discomfort in the heart go away ).